Flying, vigilance, ward

Flash
Prowess
When Ty Lee enters, tap up to one target creature. It doesn't untap during its controller's untap step for as long as you control Ty Lee.

Sleight of Hand — : Draw two cards.

Whenever a non-Human creature enters, you may pay . If you do, draw a card.

Devoid
When this creature enters, you may put a card an opponent owns from exile into that player's graveyard. If you do, return target instant or sorcery card from your graveyard to your hand.

When Ultimecia enters, tap all creatures your opponents control.
Whenever a creature you control deals combat damage to a player, draw a card.

Whenever you cast a noncreature spell, if at least four mana was spent to cast it, tap target creature an opponent controls and put a stun counter on it.
Whenever you cast a noncreature spell, if at least eight mana was spent to cast it, put eight +1/+1 counters on Ultros.

Flying
Whenever this creature or another Ally you control enters, you may put a +1/+1 counter on this creature.

Whenever you cast an instant, sorcery, or Wizard spell, this creature gains flying until end of turn.

Morph
Whenever this creature or another permanent is turned face up, you may scry 2.

: Add . Spend this mana only to pay a disturb cost or cast an instant or sorcery spell.

Toxic 1
When this creature enters, up to one target artifact you control becomes an artifact creature with base power and toughness 4/4 for as long as this creature remains on the battlefield.

If a Zombie you control would deal combat damage to a player, instead that player mills that many cards.
Whenever a creature card is put into an opponent's graveyard from their library, exile that card and create a 2/2 black Zombie creature token.

You may have this creature enter as a copy of any creature on the battlefield, except it enters with a shield counter on it if you control that creature.

Flash
This creature enters tapped.

Flying
: This creature gets +1/-1 until end of turn.
Basic landcycling

Flying
Sphinx spells you cast cost less to cast.
Whenever Unesh or another Sphinx you control enters, reveal the top four cards of your library. An opponent separates those cards into two piles. Put one pile into your hand and the other into your graveyard.

This creature can't be blocked.

Skulk
When this creature deals combat damage to a player, transform it.

Whenever another creature enters, this creature becomes a copy of that creature, except it has this ability.

Flying
Whenever you cast a spell during an opponent's turn, surveil 2.

Vigilance
Eerie — Whenever an enchantment you control enters and whenever you fully unlock a Room, put a possession counter on this creature.
When this creature dies, create an X/X blue Spirit creature token with flying, where X is the number of counters on this creature.

When Urza enters, create a 0/0 colorless Construct artifact creature token with "This token gets +1/+1 for each artifact you control."
Tap an untapped artifact you control: Add .
: Shuffle your library, then exile the top card. Until end of turn, you may play that card without paying its mana cost.

Vigilance
, : Draw a card, then discard a card.
Whenever you discard one or more artifact cards, create a tapped Powerstone token. This ability triggers only once each turn.

The second spell you cast each turn costs less to cast.

: You may exile an instant or sorcery card from your hand and put three hone counters on it. It gains "At the beginning of your upkeep, if this card is exiled, remove a hone counter from it" and "When the last hone counter is removed from this card, if it's exiled, you may cast it. It costs less to cast this way."

Flying
, Return two lands you control to their owner's hand: Copy target instant or sorcery spell. You may choose new targets for the copy.

Noncreature spells you cast cost less to cast.
Whenever you cast your first noncreature spell each turn, draw a card.