Whenever a creature you control attacks alone, it gets +X/+X until end of turn, where X is the number of creatures you control.

Flying (This creature can't be blocked except by creatures with flying or reach.)
When Aven Battle Priest enters the battlefield, you gain 3 life.

Flying
Double strike (This creature deals both first-strike and regular combat damage.)
Megamorph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its megamorph cost and put a +1/+1 counter on it.)

Whenever Bonecrusher Giant becomes the target of a spell, Bonecrusher Giant deals 2 damage to that spell's controller.

Revolt — At the beginning of your end step, if a permanent you controlled left the battlefield this turn, put a unity counter on Call for Unity.
Creatures you control get +1/+1 for each unity counter on Call for Unity.

Up to two target creatures each get +1/+0 and gain first strike until end of turn.

Menace
When Dire Fleet Interloper enters the battlefield, it explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard.)

When Disciple of Phenax enters the battlefield, target player reveals a number of cards from their hand equal to your devotion to black. You choose one of them. That player discards that card. (Each in the mana costs of permanents you control counts toward your devotion to black.)

Whenever you cycle or discard a card, you may pay . If you do, create a 2/2 blue Drake creature token with flying.

Constellation — Whenever an enchantment enters the battlefield under your control, Favored of Iroas gains double strike until end of turn.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.)
Flying
Devour 2 (As this enters the battlefield, you may sacrifice any number of creatures. This creature enters the battlefield with twice that many +1/+1 counters on it.)

As Gauntlet of Power enters the battlefield, choose a color.
Creatures of the chosen color get +1/+1.
Whenever a basic land is tapped for mana of the chosen color, its controller adds an additional one mana of that color.

You may discard a card. If you do, draw a card. (Then exile this card. You may cast the creature later from exile.)

When Highland Game dies, you gain 2 life.

Flash
Flying
Creatures entering the battlefield don't cause abilities to trigger.

You choose how each player votes this turn.
Draw a card.

Flying
Loyal Pegasus can't attack or block alone.

, Discard a card: Draw a card.

Bestow (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.)
Mogis's Warhound attacks each combat if able.
Enchanted creature gets +2/+2 and attacks each combat if able.