Modern Horizons 3

Whenever an opponent casts a spell, you may reveal the top card of your library. If you do, you may cast that card without paying its mana cost if ...

Haste Whenever Laelia, the Blade Reforged attacks, exile the top card of your library. You may play that card this turn. Whenever one or more cards...

Revolt — As long as a permanent you controlled left the battlefield this turn, if a source you control would deal noncombat damage to an opponent o...

Draw two cards. Then discard a card at random unless you pay {E}{E} (two energy counters).

Replicate—Pay {E}{E}{E}. (When you cast this spell, copy it for each time you paid its replicate cost. You may choose new targets for the copies.) ...

You don't lose unspent red mana as steps and phases end. Magecraft — Whenever you cast or copy an instant or sorcery spell, discard a card, then dr...

Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.) When Imskir Iron-Eater enters the battlefield, you draw X...

When Rosheen, Roaring Prophet enters the battlefield, mill six cards. You may put a card with {X} in its mana cost from among them into your hand. ...

This spell costs {1} less to cast for each 1 life your opponents have lost this turn. Target opponent exiles the top three cards of their library. ...

Return target artifact or creature card from your graveyard to your hand. Pyretic Rebirth deals damage equal to that card's mana value to up to one...

When Phlage enters the battlefield, sacrifice it unless it escaped. Whenever Phlage enters the battlefield or attacks, it deals 3 damage to any tar...

Destroy each artifact with mana value X or less.

Equipped creature gets +4/+0 and has trample. Equip {4} Cascade (When you cast this spell, exile cards from the top of your library until you exile...

Flying Threshold — As long as seven or more cards are in your graveyard, Fledgling Dragon gets +3/+3 and has "{R}: Fledgling Dragon gets +1/+0 unti...

When Scurry of Gremlins enters the battlefield, create two 1/1 red Gremlin creature tokens. Then you get an amount of {E} (energy counters) equal t...

Return target artifact or creature card from your graveyard to your hand. Pyretic Rebirth deals damage equal to that card's mana value to up to one...

If you would get one or more {E} (energy counters), you get that many plus one {E} instead. {T}: Draw a card. Activate only if you've paid or lost ...

Haste Landfall — Whenever a land enters the battlefield under your control, Reckless Pyrosurfer gains battle cry until end of turn. (Whenever this ...

Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.) Flying {R}: Furnace Hellkite gets +1/+0 until end of turn.

Sacrifice Mogg Mob: It deals 3 damage divided as you choose among one, two, or three targets.

Whenever you attack, you get {E} (an energy counter). {T}, Pay {E}{E}{E}: Create a 3/3 colorless Phyrexian Golem artifact creature token. Activate ...

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.) I — Ral and the Implicit Maze deals 2 damage to each creat...

Whenever an opponent casts a spell, you may reveal the top card of your library. If you do, you may cast that card without paying its mana cost if ...

Living weapon (When this Equipment enters the battlefield, create a 0/0 black Phyrexian Germ creature token, then attach this to it.) Equipped crea...