Rancor

Enchant creature
Enchanted creature gets +2/+0 and has trample.
When Rancor is put into a graveyard from the battlefield, return Rancor to its owner's hand.

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.

Taiga

Kird Ape

Kird Ape gets +1/+2 as long as you control a Forest.

Channel

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