Raph & Mikey, Troublemakers

Trample, haste
Whenever Raph & Mikey attack, reveal cards from the top of your library until you reveal a creature card. Put that card onto the battlefield tapped and attacking and the rest on the bottom of your library in a random order.

Slithering Cryptid

When this creature enters, create a Mutagen token. (It's an artifact with "{1}, {T}, Sacrifice this token: Put a +1/+1 counter on target creature. Activate only as a sorcery.")

Kitsune, Dragon's Daughter

Vigilance
Whenever Kitsune enters or deals combat damage to a player, you may exchange control of two other target creatures controlled by different players.

Swamp

Frog Butler

Deathtouch
{T}: Add one mana of any color.
{2}: This creature gains reach until end of turn.

Island

Stomped by the Foot

Kicker—Sacrifice an artifact or creature. (You may sacrifice an artifact or creature in addition to any other costs as you cast this spell.)
Target creature gets -2/-2 until end of turn. If this spell was kicked, that creature gets -5/-5 until end of turn instead.

West Wind Avatar

Trample
Whenever this creature enters or attacks, you may sacrifice a token or a land. If you do, you gain 3 life.
Disappear — At the beginning of your end step, if a permanent left the battlefield under your control this turn, draw a card.

Mona Lisa, Science Geek

Reach
{T}: Add X mana of any one color, where X is Mona Lisa's power.

Retro-Mutation

Flash
Enchant creature
Enchanted creature is a Turtle with base power and toughness 0/1. It can't attack and loses all abilities. (It also loses all other creature types.)

Courier of Comestibles

When this creature enters, you may search your library for a Food card, reveal it, put it into your hand, then shuffle. If you don't put a card into your hand this way, create a Food token. (It's an artifact with "{2}, {T}, Sacrifice this token: You gain 3 life.")

Dream Beavers

Flying
When this creature enters, each opponent loses 1 life and you gain 1 life. Scry 1. (Look at the top card of your library. You may put that card on the bottom.)

Michelangelo, Game Master

Disappear — At the beginning of your end step, if a permanent left the battlefield under your control this turn, put a +1/+1 counter on Michelangelo.

Ragamuffin Raptor

When this creature enters, return up to one target creature or Food card from your graveyard to your hand.

Death in the Family

Exile target creature with mana value 3 or less.

Mutant Town

This land enters tapped.
When this land enters, you gain 1 life.
{T}: Add {G} or {U}.

Squirrelanoids

Tenderize

Target creature you control deals damage equal to its power to target creature an opponent controls.

Forest

Lessons from Life

Draw three cards. You may put a land card from your hand onto the battlefield tapped.

Groundchuck & Dirtbag

Trample
Whenever you tap a land for mana, add {G}.

Guac & Marshmallow Pizza

Flash
When this artifact enters, target creature gets +2/+2 until end of turn. Untap it.
{2}, {T}, Sacrifice this artifact: You gain 3 life.

Rocksteady, Crash Courser

Rocksteady can't be blocked by more than one creature.
Boars you control can't be blocked by more than one creature.
Forestcycling {2} ({2}, Discard this card: Search your library for a Forest card, reveal it, put it into your hand, then shuffle.)