Prevent all combat damage that would be dealt this turn.

Taiga

Counterspell

Tropical Island

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Fireball

This spell costs {1} more to cast for each target beyond the first.
Fireball deals X damage divided evenly, rounded down, among any number of targets.

Timetwister

Each player shuffles their hand and graveyard into their library, then draws seven cards. (Then put Timetwister into its owner's graveyard.)

Ancestral Recall

Volcanic Island

Fork

Copy target instant or sorcery spell, except that the copy is red. You may choose new targets for the copy.

Black Lotus

{T}, Sacrifice Black Lotus: Add three mana of any one color.

Mox Sapphire

Mox Ruby

Mox Emerald

Channel

Until end of turn, any time you could activate a mana ability, you may pay 1 life. If you do, add {C}.