Target player mills twice X cards.

Put a defender counter on each creature.

Counter target spell. That spell's controller reveals their hand.

Haste
Whenever Jens Slopeskidder or a land enters the battlefield under your control, put a +1/+1 counter on target creature you control.
Wander—{1}{G}, Return a land you control to its owner's hand.

Flying
Discard a card: Put a +1/+1 counter on Jetstream Cruiser. Activate only once each turn.

Exile target creature. Create a token that's a copy of it except it's a Ruin artifact instead of its other types and it has spellcharge X, where X is its mana value.

Exile target creature or planeswalker.

When Kakomanties Circle enters the battlefield, create a 2/2 black Zombie creature token.
Whenever a creature you control dies, each opponent loses 1 life and you gain 1 life.

Vigilance, reach, trample
Ward—Sacrifice a noncreature permanent.

Koios, Spear of Karda enters the battlefield with a number of additional loyalty counters on him equal to your devotion to red.
[+1]: Exile the top three cards of your library. You may cast one of them.
[–3]: Koios deals damage to any nonplayer target equal to your devotion to red.
[–X]: Choose up to X target creatures with total mana value X or less. For each creature chosen this way, create a token that's a copy of it, except it has haste. Sacrifice those tokens at the beginning of the next end step.

When Kywon's Breathtaker enters the battlefield, you may exile a creature card from your graveyard. When you do, target creature gets -3/-3 until end of turn.

Whenever you cast an instant or sorcery spell, create an X/X blue Drake creature token with flying, where X is that spell's mana value.
At the beginning of your upkeep, if Drakes you control have total power 8 or greater, draw a card. Then you may cast an instant or sorcery spell from your hand without paying its mana cost.

Vigilance, trample
As long as there are five or more instant and/or sorcery cards in your graveyard, Lagoroth, Century's Apex has haste and ward {5}.
As long as there are ten or more instant and/or sorcery cards in your graveyard, Lagoroth gets +10/+10.

This spell costs {X} less to cast, where X is the power of its target.
Learning Fiendishly deals 6 damage to any target.

Enchant creature
When Left to the Sea enters the battlefield, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.

Create X blue Shrine enchantment tokens named Unmarked Shrine with “At the beginning of your upkeep, each opponent mills a card.”
{1}{U}, Exile Lost to Memory from your graveyard: Draw two cards. Activate only if an opponent has eight or more cards in their graveyard.

Whenever one or more sources an opponent controls deal damage to you, Lucille's Conquest deals 4 damage to that player unless they sacrifice two permanents.
At the beginning of your upkeep, Lucille's Conquest deals 4 damage to each opponent unless that player sacrifices two permanents.

Lucille's Edge enters the battlefield with a double strike counter on it if it wasn't cast.
{R}: Lucille's Edge gets +1/+0 until end of turn.
{R}: Lucille's Edge gains haste until end of turn.
{R}: Lucille's Edge gains trample until end of turn.

Flash
Lyceum Project enters the battlefield with a +1/+1 counter and a flying counter on it.
When Lyceum Project dies, you may put its counters on target creature.

Flying
When Malicious Skycleaver enters, pay any amount of life. It deals that much damage to each other creature.
Cybersoul {5}{B}{B}

Sacrifice a Treasure: Put a loyalty counter on Marilye, Dreaming Big.
[+1]: Draw a card, then discard a card. If you discarded a nonland card this way, create a Treasure token.
[–3]: Gain control of target artifact. It becomes a Treasure and gains “{T}: Add {U}.”
[–8]: Target opponent chooses a nonland permanent they control. You gain control of the rest.

Master of the Ring enters the battlefield with an opponent's choice of two different counters on it from among menace, first strike, and trample.

Choose a number between 0 and 5. Counter up to one target spell unless its controller pays {X}, where X is the chosen number. Then mill five minus X cards. You may return a card milled this way to your hand.

Matter Harvester has protection from mana values less than the number of artifacts you control.
Whenever a nonland permanent you don't control leaves the battlefield, create a 1/1 colorless Cyborg artifact creature token.

Choose one —
• Melt Down deals 2 damage to each creature.
• Destroy target artifact.