Improved Life gain trigger (now it's possible to specify a "from" clause and it's possible to add the "limitOnceATurn" restriction) and fixed all the primitives with gives life on life gain event without producing any loop and reviewed all the primitives with the "@lifeof" trigger.

projects/mtg/bin/Res/sets/primitives/borderline.txt

@@ -723,7 +723,7 @@ toughness=4
 [/card]
 [card]
 name=Alhammarret's Archive
-auto=@lifeof(player) except(Alhammarret's Archive): life:thatmuch
+auto=@lifeof(player) from(*[-Alhammarret's Archive]):life:thatmuch
 auto=replacedraw draw:2 noreplace
 text=If you would gain life, you gain twice that much life instead. -- If you would draw a card except the first one you draw in each of your draw steps, draw two cards instead.
 mana={5}
@@ -1138,7 +1138,7 @@ toughness=4
 name=Angel of Vitality
 abilities=flying
 auto=this(controllerlife > 24) 2/2
-auto=@lifeof(player) except(Angel of Vitality): life:1
+auto=@lifeof(player) from(*[-Angel of Vitality]):life:1 controller
 text=Flying -- If you would gain life, you gain that much life plus 1 instead. -- Angel of Vitality gets +2/+2 as long as you have 25 or more life.
 mana={2}{W}
 type=Creature
@@ -1428,7 +1428,7 @@ type=Instant
 [card]
 name=Aphemia, the Cacophony
 abilities=flying
-auto=@each my endofturn:may moveto(exile) target(enchantment|myGraveyrad) && token(Zombie,Creature Zombie,2/2,black)
+auto=@each my endofturn:may moveto(exile) target(enchantment|myGraveyard) && token(Zombie,Creature Zombie,2/2,black)
 text=Flying -- At the beginning of your end step, you may exile an enchantment card from your graveyard. If you do, create a 2/2 black Zombie creature token.
 mana={1}{B}
 type=Legendary Enchantment Creature
@@ -4297,7 +4297,7 @@ type=Artifact
 [card]
 name=Bloodthirsty Aerialist
 abilities=flying
-auto=@lifeof(player): counter(1/1,1)
+auto=@lifeof(player) from(*[-Alhammarret's Archive;-Angel of Vitality;-Boon Reflection]):counter(1/1,1)
 text=Flying -- Whenever you gain life, put a +1/+1 counter on Bloodthirsty Aerialist.
 mana={1}{B}{B}
 type=Creature
@@ -4716,7 +4716,7 @@ type=Sorcery
 [/card]
 [card]
 name=Boon Reflection
-auto=@lifeof(player) except(Boon Reflection): life:thatmuch
+auto=@lifeof(player) from(*[-Boon Reflection]):life:thatmuch
 text=If you would gain life, you gain twice that much life instead.
 mana={4}{W}
 type=Enchantment
@@ -9451,7 +9451,7 @@ toughness=3
 [/card]
 [card]
 name=Dawn of Hope
-auto=@lifeof(player):pay({2}) draw:1
+auto=@lifeof(player) from(*[-Alhammarret's Archive;-Angel of Vitality;-Boon Reflection]):pay({2}) draw:1
 auto={3}{W}:create(soldier:creature soldier:1/1:white:lifelink)
 text=Whenever you gain life, you may pay {2}. If you do, draw a card. -- {3}{W}: Create a 1/1 white Soldier creature token with lifelink.
 mana={1}{W}
@@ -13045,7 +13045,7 @@ type=Sorcery
 [/card]
 [card]
 name=Epicure of Blood
-auto=@lifeof(player):life:-1 opponent
+auto=@lifeof(player) from(*[-Alhammarret's Archive;-Angel of Vitality]):life:-1 opponent
 text=Whenever you gain life, each opponent loses 1 life.
 mana={4}{B}
 type=Creature
@@ -13893,7 +13893,7 @@ type=Instant
 [card]
 name=Famished Paladin
 auto=doesnotuntap
-auto=@lifeof(player):untap(this)
+auto=@lifeof(player) from(*[-Alhammarret's Archive;-Angel of Vitality;-Boon Reflection]):untap(this)
 text=Famished Paladin doesn't untap during your untap step. -- Whenever you gain life, untap Famished Paladin.
 mana={1}{W}
 type=Creature
@@ -14834,8 +14834,10 @@ type=Enchantment
 [/card]
 [card]
 name=Firesong and Sunspeaker
-auto=lord(instant,sorcery[red]|mycastingzone): lifelink
-auto=@lifeof(player) from (*[instant;sorcery[white]]|mystack):damage:3 target(creature,player,planeswalker)
+auto=@damaged(creature) from(*[instant;sorcery;red]|mystack,mygraveyard):life:thatmuch controller
+auto=@damageof(player) from(*[instant;sorcery;red]|mystack,mygraveyard):life:thatmuch controller
+auto=@damagefoeof(player) from(*[instant;sorcery;red]|mystack,mygraveyard):life:thatmuch controller
+auto=@lifeof(player) from(*[instant;sorcery;white]|mystack,mygraveyard)):damage:3 target(creature,player)
 text=Red instant and sorcery spells you control have lifelink. -- Whenever a white instant or sorcery spell causes you to gain life, Firesong and Sunspeaker deals 3 damage to target creature or player.
 mana={4}{R}{W}
 type=Legendary Creature
@@ -16573,7 +16575,7 @@ type=Sorcery
 [/card]
 [card]
 name=Gideon's Company
-auto=@lifeof(player):counter(1/1,2)
+auto=@lifeof(player) from(*[-Alhammarret's Archive;-Angel of Vitality;-Boon Reflection]):counter(1/1,2)
 auto={3}{W}:counter(0/0,1,Loyalty) target(planeswalker[gideon])
 text=Whenever you gain life, put two +1/+1 counters on Gideon's Company. -- {3}{W}: Put a loyalty counter on target Gideon planeswalker.
 mana={3}{W}
@@ -18562,7 +18564,7 @@ type=Legendary Land
 [/card]
 [card]
 name=Hallowed Priest
-auto=@lifeof(player):counter(1/1,1)
+auto=@lifeof(player) from(*[-Alhammarret's Archive;-Angel of Vitality;-Boon Reflection]):counter(1/1,1)
 text=Whenever you gain life, put a +1/+1 counter on Hallowed Priest
 mana={1}{W}
 type=Creature
@@ -19207,7 +19209,7 @@ name=Heliod, Sun-Crowned
 abilities=indestructible
 auto=this(variable{type:manaw}<5) transforms((removetypes,newability[becomes(Legendary Enchantment God)]))
 auto=this(variable{type:manaw}>4) transforms((Legendary Enchantment Creature))
-auto=@lifeof(player):counter(1/1,1) target(creature,enchantment|myBattlefield)
+auto=@lifeof(player) from(*[-Alhammarret's Archive;-Angel of Vitality;-Boon Reflection]):counter(1/1,1) target(creature,enchantment|myBattlefield)
 auto={1}{W}:lifelink target(other creature) ueot
 text=Indestructible -- As long as your devotion to white is less than five, Heliod isn’t a creature. -- Whenever you gain life, put a +1/+1 counter on target creature or enchantment you control. -- {1}{W}: Another target creature gains lifelink until end of turn.
 mana={2}{W}
@@ -25823,7 +25825,7 @@ subtype=Equipment
 [/card]
 [card]
 name=Marauding Blight-Priest
-auto=@lifeof(player):life:-1 opponent
+auto=@lifeof(player) from(*[-Alhammarret's Archive;-Angel of Vitality;-Boon Reflection]):life:-1 opponent
 text=Whenever you gain life, each opponent loses 1 life.
 mana={2}{B}
 type=Creature
@@ -29625,7 +29627,7 @@ toughness=3
 [card]
 name=Oloro, Ageless Ascetic
 auto=@each my upkeep:life:2 controller
-auto=@lifeof(player):pay({1}) draw:1 controller && life:-1 opponent
+auto=@lifeof(player) from(*[-Alhammarret's Archive;-Angel of Vitality;-Boon Reflection]):pay({1}) draw:1 controller && life:-1 opponent
 #wagic doesn't have command zone
 text=At the beginning of your upkeep, you gain 2 life. -- Whenever you gain life, you may pay {1}. If you do, draw a card and each opponent loses 1 life. -- At the beginning of your upkeep, if Oloro, Ageless Ascetic is in the command zone, you gain 2 life.
 mana={3}{W}{U}{B}
@@ -34345,7 +34347,8 @@ toughness=2
 [card]
 name=Rhox Faithmender
 abilities=lifelink
-auto=@lifeof(player) except(Rhox Faithmender): life:thatmuch
+auto=@lifeof(player) from(*[-Rhox Faithmender]):life:thatmuch
+auto=@damaged(creature,player) from(Rhox Faithmender|myBattlefield):life:thatmuch
 text=Lifelink (Damage dealt by this creature also causes you to gain that much life.) -- If you would gain life, you gain twice that much life instead.
 mana={3}{W}
 type=Creature
@@ -36625,7 +36628,7 @@ toughness=5
 [card]
 name=Scion of the Swarm
 abilities=flying
-auto=@lifeof(player):counter(1/1,1)
+auto=@lifeof(player) from(*[-Alhammarret's Archive;-Angel of Vitality;-Boon Reflection]):counter(1/1,1)
 text=Flying -- Whenever you gain life, put a +1/+1 counter on Scion of the Swarm.
 mana={3}{B}{B}
 type=Creature
@@ -40640,7 +40643,7 @@ toughness=4
 [card]
 name=Spellpyre Phoenix
 abilities=flying
-auto=moveTo(myHand) target(*[instant;sorcery{_cycling_}|myGravyeard)
+auto=moveTo(myHand) target(*[instant;sorcery{_cycling_}|myGraveyard)
 autograveyard=if type(@cycled(*|myHand)~morethan~2 then moveTo(myhand) target(Spellpyre Phoenix|myGraveyard))
 text=Flying -- When Spellpyre Phoenix enters the battlefield, you may return target instant or sorcery card with a cycling ability from your graveyard to your hand. -- At the beginning of each end step, if you cycled two or more cards this turn, return Spellpyre Phoenix from your graveyard to your hand.
 mana={3}{R}{R}
@@ -46234,7 +46237,7 @@ toughness=4
 [/card]
 [card]
 name=Twinblade Paladin
-auto=@lifeof(player): counter(1/1)
+auto=@lifeof(player) from(*[-Alhammarret's Archive;-Angel of Vitality;-Boon Reflection]):counter(1/1)
 auto=this(controllerlife > 24) double strike
 text=Whenever you gain life, put a +1/+1 counter on Twinblade Paladin. -- As long as you have 25 or more life, Twinblade Paladin has double strike. (It deals both first-strike and regular combat damage.)
 mana={3}{W}
@@ -48083,8 +48086,8 @@ toughness=4
 [/card]
 [card]
 name=Vito, Thorn of the Dusk Rose
-auto=@lifeof(player):dynamicability<!myself thatmuchlifeloss srcopponent!>
-auto={3}{B}{B}:all(creature|myBattlefield) lifelink ueot
+auto=@lifeof(player):life:-thatmuch opponent
+auto={3}{B}{B}:all(creature|myBattlefield) transforms((,newability[lifelink])) ueot
 text=Whenever you gain life, target opponent loses that much life. -- {3}{B}{B}: Creatures you control gain lifelink until end of turn.
 mana={2}{B}
 type=Legendary Creature
@@ -49165,7 +49168,7 @@ type=Artifact
 [/card]
 [card]
 name=Well of Lost Dreams
-auto=@lifeof(player):foreach:life: may pay({lifeof}) draw:thatmuch controller
+auto=@lifeof(player):thisforeach(variable{thatmuch}) ability$!name(Pay 1 and draw 1) pay[[{1}]] name(Pay 1 and draw 1) draw:1?name(Don't pay) donothing!$ controller
 text=Whenever you gain life, you may pay {X}, where X is less than or equal to the amount of life you gained. If you do, draw X cards.
 mana={4}
 type=Artifact