Counterspell

Unstable Mutation

Enchant creature
Enchanted creature gets +3/+3.
At the beginning of the upkeep of enchanted creature's controller, put a -1/-1 counter on that creature.

Regrowth

Return target card from your graveyard to your hand.

Psionic Blast

Psionic Blast deals 4 damage to any target and 2 damage to you.

Braingeyser

Berserk

Cast this spell only before the combat damage step.
Target creature gains trample and gets +X/+0 until end of turn, where X is its power. At the beginning of the next end step, destroy that creature if it attacked this turn.

Scryb Sprites

Argothian Pixies

Argothian Pixies can't be blocked by artifact creatures.
Prevent all damage that would be dealt to Argothian Pixies by artifact creatures.

Giant Growth

Target creature gets +3/+3 until end of turn.