Flying, haste
Amity — Whenever you attack with Warden of Heart and exactly one other creature, you may put a legendary or Dragon card from your hand onto the battlefield tapped and attacking.

Bouncers-for-Hire can't attack unless you control a red permanent.

Trample
When Canopy Creeper enters, create two Berry tokens.

When Reaching Remnant enters, it deals 4 damage to target creature with flying you don't control.
Spellcharge 3

Sleeper Insurgent doesn't untap during your untap step.
Whenever Sleeper Insurgent becomes the target of a spell or ability you control, untap it. This ability triggers only once each turn.

Whenever Raksolcs Ravage-Soul deals combat damage to a player, create a Treasure token.
Whenever you sacrifice a permanent, Minotaurs you control get +2/+0 until end of turn. Creatures you control gain menace until end of turn. This ability triggers only once each turn.

As an additional cost to cast this spell, sacrifice a creature.
When Skophos Conqueror enters, draw a card. Skophos Conqueror deals 2 damage to each opponent.

Flying
When Warden of Wishes enters, put three wish counters on it, then you gain 7 life.
Whenever you lose life, you may remove a wish counter from Warden of Wishes. If you do, put a card you own from outside the game into your hand.

Flying
If a Dragon you control would deal damage to an opponent, it deals that much damage plus 1 instead.
{2}{U}{R}: Transform Iviana's Spellmaw.

Flying
Ward—{2}, Pay 2 life.
Whenever you cast a noncreature spell, draw a card.

As an additional cost to cast this spell, exile two permanent cards from your graveyard.
Whenever Spikey, Jack's Gravetiller deals combat damage to a player, return a card exiled with it to its owner's hand.
You may cast Spikey from your graveyard.

Flash
When Hazakh Ambassador enters, target creature gains deathtouch until end of turn.
Basic landcycling {1}{B}

Flying, first strike, lifelink
Landfall — Whenever a land you control enters, other creatures you control get +2/+2 until end of turn.

Flying, vigilance
Other creatures you control are Armies in addition to their other types.
At the beginning of your end step, create a 0/0 white Army creature token, then put a +1/+1 counter on each Army you control.

When Bangtan Security enters, target creature gets +2/+0 and gains indestructible until end of turn.

Vigilance
Whenever this creature transforms into Crown Betrayer or another permanent you control transforms, Crown Betrayer gets +2/+0 and gains indestructible until end of turn.

Flash
Vigilance
Whenever Exuberant Caprisaur attacks or blocks, you gain 2 life. Then if your life total is greater than 20, put two +1/+1 counters on Exuberant Caprisaur.

Vigilance
Whenever Mokar Warband attacks, create a 1/1 white Human creature token that's attacking.

{1}, Remove a +1/+1 counter from Traveler of Dawn: Exile target creature. Return that card to the battlefield under its owner's control at the beginning of the next end step.

Equipped creature gets +2/+2.
Equip {2}
Spellcharge 4

{T}: Draw a card, then discard a card.
Once each turn, when you cast a spell from your graveyard, you may create a 2/1 blue Human Pirate creature token.
Crew 2

Dormant Monstrosity enters tapped with three stun counters on it.
{1}{U}, Remove a counter from Dormant Monstrosity: Draw a card.

Whenever Floe Master enters or another creature you control surfaces, tap up to one target creature and put a stun counter on it.
Surface {5}{U}{U}

When Masked Duo enters, tap up to one target creature. If you control an artifact, that creature doesn't untap during its controller's next untap step.

Flying
Drop — When Sphinx of the Soundveins enters, if you didn't cast any creature spells during your last turn, untap up to three lands.