Whenever Riptide Entrancer deals combat damage to a player, you may sacrifice it. If you do, gain control of target creature that player controls. (This effect doesn't end at end of turn.) Morph UU (You may play this face down as a 2/2 creature for 3. Turn it face up any time for its morph cost.)
Flash (You may play this spell any time you could play an instant.) When Venser, Shaper Savant comes into play, return target spell or permanent to its owner's hand.
When Slithermuse leaves play, choose an opponent. If that player has more cards in hand than you, draw cards equal to the difference. Evoke 3U (You may play this spell for its evoke cost. If you do, it's sacrificed when it comes into play.)
T: Add C. 4, T: Proliferate (Choose any number of permanents and/or players, then give each another counter of each kind already there.)
Destroy target permanent. Its controller creates a 3/3 green Elephant creature token.
Changeling (This card is every creature type.) Changeling Outcast can't block and can't be blocked.
Deathtouch Morph—Reveal a black card in your hand. (You may cast this card face down as a 2/2 creature for 3. Turn it face up any time for its morph cost.) When Ruthless Ripper is turned face up, target player loses 2 life.
Double strike Whenever Goring Ceratops attacks, other creatures you control gain double strike until end of turn.
Affinity for artifacts (This spell costs 1 less toplay for each artifact you control.) Draw two cards.
Whenever an Aura enters the battlefield under your control, if you cast it, you may search your library for an Aura card with mana value less than or equal to that Aura and with a different name than each Aura you control, put that card onto the battlefield attached to Light-Paws, Emperor's Voice, then shuffle.
T: Add C. T: Add one mana of any color. Activate only if Mirrex entered the battlefield this turn. 3, T: Create a 1/1 colorless Phyrexian Mite artifact creature token with toxic 1 and "This creature can't block." (Players dealt combat damage by it also get a poison counter.)
Read ahead (Choose a chapter and start with that many lore counters. Add one after your draw step. Skipped chapters don't trigger. Sacrifice after III.) I — Target opponent reveals their hand. You choose a creature or planeswalker card from it. That player discards that card. II — Search your library for a card, put that card into your hand, then shuffle. You lose 3 life. III — Put target creature card from a graveyard onto the battlefield under your control.
Flash When Dress Down enters the battlefield, draw a card. Creatures lose all abilities. At the beginning of the end step, sacrifice Dress Down.
Enchant snow land you control When On Thin Ice enters the battlefield, exile target creature an opponent controls until On Thin Ice leaves the battlefield.