Creatures you control have base power and toughness X/X until end of turn.
{G/U}
Bioshift
Instant
Move any number of +1/+1 counters from target creature onto another target creature with the same controller.
{1}{G}{U}
Bred for the Hunt
Enchantment
Whenever a creature you control with a +1/+1 counter on it deals combat damage to a player, you may draw a card.
{2}{G}{G}{U}{U}
Experiment Kraj
Legendary Creature - Ooze Mutant
Experiment Kraj has all activated abilities of each other creature with a +1/+1 counter on it.
{T}: Put a +1/+1 counter on target creature.
4 /
6
{2}{G}{U}
Fathom Mage
Creature - Human Wizard
Evolve (Whenever a creature enters the battlefield under your control, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.)
Whenever a +1/+1 counter is put on Fathom Mage, you may draw a card.
1 /
1
{1}{G/U}{G/U}
Gilder Bairn
Creature - Ouphe
{2}{G/U}, {Q}: Double the number of each kind of counter on target permanent. ({Q} is the untap symbol.)
1 /
3
{1}{G}{U}
Lorescale Coatl
Creature - Snake
Whenever you draw a card, put a +1/+1 counter on Lorescale Coatl.
2 /
2
{2}{G}{U}
Master Biomancer
Creature - Elf Wizard
Each other creature you control enters the battlefield with a number of additional +1/+1 counters on it equal to Master Biomancer's power and as a Mutant in addition to its other types.
2 /
4
{1}{G}{U}
Plaxcaster Frogling
Creature - Frog Mutant
Graft 3 (This creature enters the battlefield with three +1/+1 counters on it. Whenever another creature enters the battlefield, you may move a +1/+1 counter from this creature onto it.)
{2}: Target creature with a +1/+1 counter on it gains shroud until end of turn. (It can't be the target of spells or abilities.)
0 /
0
{2}{G}{G}{U}{U}
Prime Speaker Zegana
Legendary Creature - Merfolk Wizard
Prime Speaker Zegana enters the battlefield with X +1/+1 counters on it, where X is the greatest power among other creatures you control.
When Prime Speaker Zegana enters the battlefield, draw cards equal to its power.
1 /
1
{G}{U}
Shambleshark
Creature - Shark Crab
Flash (You may cast this spell any time you could cast an instant.)
Evolve (Whenever a creature enters the battlefield under your control, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.)
2 /
1
{G/U}{G/U}
Simic Guildmage
Creature - Elf Wizard
({G/U} can be paid with either {G} or {U}.)
{1}{G}: Move a +1/+1 counter from target creature onto another target creature with the same controller.
{1}{U}: Attach target Aura attached to a permanent to another permanent with the same controller.
2 /
2
{1}{G}{U}
Vorel of the Hull Clade
Legendary Creature - Human Merfolk
{G}{U}, {T}: Double the number of each kind of counter on target artifact, creature, or land.
1 /
4
{G}{U}
Zameck Guildmage
Creature - Elf Wizard
{G}{U}: This turn, each creature you control enters the battlefield with an additional +1/+1 counter on it.
{G}{U}, Remove a +1/+1 counter from a creature you control: Draw a card.
2 /
2
{1}{G}{U}
Biovisionary
Creature - Human Wizard
At the beginning of the end step, if you control four or more creatures named Biovisionary, you win the game.
2 /
3
{1}{G}{U}
Bounding Krasis
Creature - Fish Lizard
Flash (You may cast this spell any time you could cast an instant.)
When Bounding Krasis enters the battlefield, you may tap or untap target creature.