revised "steal" ability

steal - gain control of target/s until it leaves battlefield or  its
current controller loses control of the "stealer"...

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

@@ -4041,15 +4041,6 @@ power=8
 toughness=8
 [/card]
 [card]
-name=Dragonlord Silumgar
-text=Flying, deathtouch -- When Dragonlord Silumgar enters the battlefield, gain control of target creature or planeswalker for as long as you control Dragonlord Silumgar.
-mana={4}{U}{B}
-type=Legendary Creature
-subtype=Elder Dragon
-power=3
-toughness=5
-[/card]
-[card]
 name=Dragonlord's Prerogative
 text=As an additional cost to cast Dragonlord's Prerogative, you may reveal a Dragon card from your hand. -- If you revealed a Dragon card or controlled a Dragon as you cast Dragonlord's Prerogative, Dragonlord's Prerogative can't be countered. -- Draw four cards.
 mana={4}{U}{U}
@@ -9463,15 +9454,6 @@ power=3
 toughness=3
 [/card]
 [card]
-name=Master Thief
-text=When Master Thief enters the battlefield, gain control of target artifact for as long as you control Master Thief.
-mana={2}{U}{U}
-type=Creature
-subtype=Human Rogue
-power=2
-toughness=2
-[/card]
-[card]
 name=Master Warcraft
 text=Cast Master Warcraft only before attackers are declared. -- You choose which creatures attack this turn. -- You choose which creatures block this turn and how those creatures block.
 mana={2}{RW}{RW}
@@ -11062,15 +11044,6 @@ type=Enchantment
 subtype=Aura
 [/card]
 [card]
-name=Orcish Squatters
-text=Whenever Orcish Squatters attacks and isn't blocked, you may gain control of target land defending player controls for as long as you control Orcish Squatters. If you do, Orcish Squatters assigns no combat damage this turn.
-mana={4}{R}
-type=Creature
-subtype=Orc
-power=2
-toughness=3
-[/card]
-[card]
 name=Ordeal of Erebos
 text=Enchant creature -- Whenever enchanted creature attacks, put a +1/+1 counter on it. Then if it has three or more +1/+1 counters on it, sacrifice Ordeal of Erebos. -- When you sacrifice Ordeal of Erebos, target player discards two cards.
 mana={1}{B}
@@ -13202,15 +13175,6 @@ mana={G}
 type=Sorcery
 [/card]
 [card]
-name=Roil Elemental
-text=Flying -- Landfall — Whenever a land enters the battlefield under your control, you may gain control of target creature for as long as you control Roil Elemental.
-mana={3}{U}{U}{U}
-type=Creature
-subtype=Elemental
-power=3
-toughness=2
-[/card]
-[card]
 name=Roiling Waters
 text=Return up to two target creatures your opponents control to their owners' hands. Target player draws two cards.
 mana={5}{U}{U}
@@ -16498,15 +16462,6 @@ type=Artifact
 subtype=Equipment
 [/card]
 [card]
-name=Thrull Champion
-text=Thrull creatures get +1/+1. -- {T}: Gain control of target Thrull for as long as you control Thrull Champion.
-mana={4}{B}
-type=Creature
-subtype=Thrull
-power=2
-toughness=2
-[/card]
-[card]
 name=Thrull Parasite
 text=Extort (Whenever you cast a spell, you may pay {WB}. If you do, each opponent loses 1 life and you gain that much life.) -- {T}, Pay 2 life: Remove a counter from target nonland permanent.
 mana={B}