Each spell you cast that's red or green costs less to cast.

: Target creature can't be blocked this turn.

Flying
This creature gets +2/+0 as long as you've drawn two or more cards this turn.

Target creature you control fights target creature you don't control. When the creature you control wins the fight, draw a card.

Create a 1/1 green Squirrel creature token.
Storm (When you cast this spell, copy it for each spell cast before it this turn.)

Choose creature or land. Reveal the top four cards of your library. Put all cards of the chosen type revealed this way into your hand and the rest into your graveyard.

Deathtouch
When Plaguecrafter's Familiar enters the battlefield, choose a creature card in your hand. It perpetually gains deathtouch.

Ninjutsu (, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)
Whenever this creature deals combat damage to a player, exile up to two target cards from that player's graveyard.

Return target creature to its owner's hand. If you've discarded a card this turn, draw a card.

Target creature's base power perpetually becomes 0.

Modular 2 (This creature enters with two +1/+1 counters on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

, Exile this card from your graveyard: Create two 2/2 green Bear creature tokens. Activate only as a sorcery.

Draw a card. Until end of turn, target creature gains trample and gets +1/+0 for each card you've drawn this turn. (A creature with trample can deal excess combat damage to the player or planeswalker it's attacking.)

Changeling (This card is every creature type.)

Create two 1/1 red Goblin creature tokens.

Equipped creature gets +1/+0 and has trample.
, Sacrifice this Equipment: It deals 3 damage to any target.
Equip

You gain shroud until end of turn. (You can't be the target of spells or abilities.)
Cycling (, Discard this card: Draw a card.)

Equipped creature gets +3/+0 and is every creature type.
Equip (: Attach to target creature you control. Equip only as a sorcery.)

: Surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

Hellbent — As long as you have no cards in hand, Sliver creatures you control have ": This creature deals 1 damage to target player or planeswalker."

Look at the top three cards of your library. Put one of them into your hand and the rest into your graveyard.

Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)

Enchant creature
Enchanted creature gets -6/-0 and loses flying.

Tap target creature. That creature perpetually gains "This creature doesn't untap during your untap step" and ": Untap this creature."

Sliver creatures you control have first strike.

When this creature enters, return target creature to its owner's hand.

When this creature enters, you may sacrifice a land. If you do, search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.

Vigilance (Attacking doesn't cause this creature to tap.)
, : Draw a card. This ability costs less to activate for each +1/+1 counter on creatures you control.

Trample
When this creature enters, you get (an energy counter).
Whenever this creature attacks, you may pay . If you do, it gets +2/+0 until end of turn.

, , Pay 1 life: Draw a card. Activate only if you've discarded a card this turn.

As an additional cost to cast this spell, sacrifice a permanent.
Exile target artifact, creature, or enchantment.

Target player discards two cards.
Overload (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

When this creature enters, it deals 1 damage to any target.

Whenever this creature or another creature you control dies, scry 1.