Target creature you control gets +4/+3 until end of turn.

Target creature you control gets +X/+X, gains trample, and becomes a legendary Rebel until end of turn, where X is its power. Sacrifice that creature at the beginning of the next end step.

Flash
When Agent of Deception enters, counter target creature or planeswalker spell unless its controller pays {X}, where X is your devotion to blue.

Target player reveals their hand. You choose a nonland card from it or a card from their graveyard. Exile that card. You lose 1 life.

At the beginning of each opponent's upkeep, that player may pay life equal to the number of pain counters they have plus 1. If they don't, look at their hand, choose a card from it, and exile that card. If they do, that player gets a pain counter.
You may cast cards exiled with Alehana, and mana of any type can be spent to cast them.

Alehana's Eyes has +1/+1 and can't be blocked as long as you've cast an instant or sorcery spell with mana value 4 or greater this turn.

Create a token that's a copy of target creature you control, except it's a 1/1. When you do, pay for and choose any number.
+{C} — That token becomes a copy of a different target creature.
+{W} — You gain life equal to the number of creatures you control.
+{B} — Each player sacrifices a creature.

Whenever you cast a spell that targets Alranta Patrol, create a 1/1 white Human creature token. If Alranta Patrol is attacking, that token enters tapped and attacking.

When Ambient Illuminator dies, if you've scried this turn, you gain 3 life and draw a card.

Vigilance, reach, trample, ward {3}
Ancient Cloudgrazer enters with X +1/+1 counters on it.

Whenever Anesthesiologist attacks, teach Anesthesiologist lifelink if you control a white permanent. Otherwise, you gain 2 life.

Create a 1/1 white Cleric Noble creature token with lifelink and a 1/1 white Soldier creature token with vigilance.

Whenever you cast a spell that targets Anvilwrought Lion, creatures you control get +1/+0 until end of turn.

Put a deathtouch counter on target creature you control. Untap that creature. It gains hexproof, reach and indestructible until end of turn.

Archaic Obelisk enters with a charge counter on it.
{T}: Mill two cards, then you may remove a charge counter from Archaic Obelisk. If you do, return a card milled this way to your hand.

When Arduous Miners enters, you may have all players discard a card.
Whenever one or more cards leave your graveyard, create a tapped Treasure token.

Army Reserves enters with X +1/+1 counters and a defender counter on it.
{1}: Move a counter from Army Reserves onto another target creature. Activate only as a sorcery.

Enchant creature
Enchanted creature loses all abilities and is a white Peasant with base power and toughness 1/1 named Penitent Prisoner.
When enchanted creature leaves the battlefield, you may draw a card.

As an additional cost to cast artifact spells, you may pay {2}. When you do, each opponent sacrifices an untapped creature.

Deathtouch
If an opponent would lose life, they lose that much life plus 1 instead.
Spellcharge 3

Create a tapped 2/1 red Human Warrior creature token.
Flashback {2}{R}

Whenever another creature you control enters, put a first strike counter on Aspiring Hero if that creature has first strike and Aspiring Hero doesn't. The same is true for flying, deathtouch, double strike, haste, hexproof, indestructible, lifelink, menace, reach, trample, vigilance, and ward.

Target creature gets +2/+0 until end of turn and must be blocked this turn if able.

Choose a creature type. Put a +1/+1 counter on each creature you control of the chosen type.
If you control two or more creatures that share a name, draw a card.

When Attuned District enters, scry 2.
Whenever you scry, you may pay {1}. If you do, create a 0/0 colorless Construct artifact creature token, then put X +1/+1 counters on it, where X is the number of cards you looked at.