#Testing High Tide.
#High Tide's rules text: "Until end of turn, whenever a player taps an Island for mana, that player adds {U} to his or her mana pool (in addition to the mana the land produces)."
[INIT]
FIRSTMAIN
[PLAYER1]
hand:High Tide
inplay:Island,Tundra
manapool:{U}
[PLAYER2]
[DO]
High Tide
Island
Tundra
choice 0
[ASSERT]
FIRSTMAIN
[PLAYER1]
graveyard:High Tide
inplay:Island,Tundra
manapool:{U}{U}{U}{W}
[PLAYER2]
[END]