Ripple 4 (When you cast this spell, you may reveal the top four cards of your library. You may cast spells with the same name as this spell from among those cards without paying their mana costs. Put the rest on the bottom of your library.)
Surging Flame deals 2 damage to any target.

This creature gets +1/+0 for each other Rat you control.
Threshold — Whenever you attack with one or more Rats, if there are seven or more cards in your graveyard, you may pay . If you do, return this card from your graveyard to the battlefield tapped and attacking.

First strike
At the beginning of each end step, if an opponent has more cards in hand than you, this creature becomes prepared. (While it's prepared, you may cast a copy of its spell. Doing so unprepares it.)

, Sacrifice a creature: Target opponent reveals their hand. You choose a card from it. That player discards that card. Activate only as a sorcery.

Engulfing Flames deals 1 damage to target creature. It can't be regenerated this turn.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

(: Add .)

Flying, ward (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays .)
This creature's power is equal to the number of noncreature, nonland cards in your graveyard.
When this creature dies, if there's a Lesson card in your graveyard, draw a card.

This creature can't be blocked.

Target player mills four cards.
Splice onto Arcane (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)

Whenever you crank this Contraption, until end of turn, target creature gets +1/+0, gains flying, and becomes an artifact in addition to its other types.

Flying, haste
Whenever you discard a card, Hobgoblin gets +2/+0 until end of turn.

: This creature gets +3/-3 until end of turn.

Graft 2 (This creature enters with two +1/+1 counters on it. Whenever another creature enters, you may move a +1/+1 counter from this creature onto it.)
: Regenerate target creature with a +1/+1 counter on it.

Kicker (You may pay an additional as you cast this spell.)
This spell can't be countered.
Urza's Rage deals 3 damage to any target. If this spell was kicked, instead it deals 10 damage to that permanent or player and the damage can't be prevented.

When Madame Masque enters, she connives. (Draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on this creature.)
Whenever you draw your second card each turn, create a 2/1 black Villain creature token with menace. (It can't be blocked except by two or more creatures.)

: The next time a green source of your choice would deal damage to you this turn, prevent that damage.

This land enters tapped.
: Add or .

Spells your opponents cast that target a creature or planeswalker you control cost more to cast.
−2: Create a 2/2 blue Wizard creature token. Draw a card, then discard a card.

Flying
Whenever you sacrifice a land, create a tapped token that's a copy of this creature if seven or more land cards are in your graveyard. Otherwise, create a tapped 1/1 black Insect creature token with flying.

, , Discard a card: You gain 4 life.
, , Pay 1 life: Create a 0/1 white Goat creature token.
, , Sacrifice a creature: Return target artifact card from your graveyard to your hand.
, , Sacrifice an artifact: Draw a card.