When this creature enters, it deals 4 damage to target player or planeswalker.

When Grilka enters, gain control of target creature an opponent controls until end of turn. Untap it. Until end of turn, it gains trample, haste, and "Whenever this creature deals combat damage to a player, create that many tapped Treasure tokens."

At the beginning of your upkeep, target opponent reveals the top three cards of their library, may put a creature card from among them onto the battlefield, then puts the rest into their graveyard. You do the same with the top three cards of your library. If two creatures are put onto the battlefield this way, those creatures fight each other.

Haste
This creature gets -2/-2 as long as red is the most common color among all permanents or is tied for most common.

When this enchantment enters, choose four nonenchantment permanents you don't control and put an aim counter on each of them.
At the beginning of your end step, if two or more permanents you don't control have an aim counter on them, destroy one of those permanents at random.

This spell costs less to cast, where X is the number of cards in your graveyard that are instant cards, sorcery cards, and/or have an Adventure.

Sacrifice all creatures you control, then create that many 4/4 red Hellion creature tokens.

Wither
This creature must be blocked if able.

Inferno Jet deals 6 damage to target opponent or planeswalker.
Cycling

When this creature enters, amass Zombies 2.

Haste
This creature can't block.

Trample, haste
Channel — , Discard this card: Target creature gets +3/+1 and gains trample until end of turn.

When this creature enters, ask a person outside the game to high-five you. If they won't, this creature gains haste until end of turn.

Jaws of Stone deals X damage divided as you choose among any number of targets, where X is the number of Mountains you control as you cast this spell.

First strike, haste
Symphony of Pain — Whenever you cast a spell from anywhere other than your hand, this creature deals damage equal to that spell's mana value to target opponent.

Partner with Sylvia Brightspear
Flying, haste
Knights your team controls have flying and haste.

When this creature enters, exile the top card of your library. Until the end of your next turn, you may play that card.
Basic landcycling

Whenever you cast your first instant, sorcery, or Villain spell each turn, exile it, then exile cards from the top of your library until you exile a nonland card. Lady Loki deals damage to each opponent equal to the difference between that spell's mana value and that nonland card's mana value. You may cast that card without paying its mana cost.

Haste
Cycling

Enchant creature
When this Aura enters, it deals 2 damage to any target.
Enchanted creature gets +2/+2.

Haste, horsemanship

Whenever this creature attacks alone, it gets +1/+1 and gains trample until end of turn.

Delve
Magmatic Sinkhole deals 5 damage to target creature or planeswalker.

Haste
When this creature enters, up to two target creatures can't block this turn.

Haste
Multicolored creatures you control have haste.

Choose one —
• Disarm — Destroy target artifact. Create four Treasure tokens.
• Detonate — Megaton's Fate deals 8 damage to each creature. Each player gets four rad counters.

At the beginning of combat on your turn, if you control each creature on the battlefield with the greatest power, gain control of target creature an opponent controls until end of turn. Untap that creature. It gains haste until end of turn.

Choose a nonland card name and a number greater than 0. Target player reveals their library. If that library contains exactly the chosen number of cards with the chosen name, Mindblaze deals 8 damage to that player. Then that player shuffles.

Whenever a nontoken creature you control enters, flip a coin until you lose a flip. For each flip you won, create a token that's a copy of that creature. Those tokens gain haste. Exile them at the beginning of the next end step.

Flying
Whenever you cast a spell from exile, copy it. You may choose new targets for the copy. If it's a permanent spell, the copy gains haste and "At the beginning of the end step, sacrifice this permanent." (A copy of a permanent spell becomes a token.)