Menace
When Speaker of Ash enters, you may sacrifice a nonland permanent or discard a card. If you do, each opponent sacrifices a nonland permanent with mana value equal to the sacrificed permanent or discarded card's mana value.

Prowess
When Speaker of the Lightning enters, return target instant or sorcery card from your graveyard to your hand.

Whenever you amp it up, Spirit of the Crowd gets +1/+1 and gains trample until end of turn.

Flying
Drop — When Staggering Wyvern enters, if you didn't cast any creature spells during your last turn, tap up to two target creatures. Those creatures don't untap during their controller's next untap step.

Whenever Steelhorn Crusher or another artifact you control enters, artifact creatures you control gain menace until end of turn.

Once each turn, when an opponent is dealt damage, you may pay {R} and discard up to X cards, where X is equal to the damage dealt. If you do, draw that many cards. Put a +1/+1 counter on Strongarm Gambler.

Flash
When Supporting Crowd enters, you may have another target creature you control dare 5.

{T}: Add {C}.
Spellcharge 4

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

{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

Drop — When Viral Upstarts enters, if you didn't cast any creature spells during your last turn, draw a card and you lose 1 life.

Flying, trample, haste
Vishanki Hellkite enters with a +1/+1 counter on it for each mana from an artifact source spent to cast it.

Prowess, prowess

When Widowed Maiden enters, return target creature card from your graveyard to your hand.
Spellcharge 3

Menace
When Wildcaster Ogre enters, exile an instant or sorcery card from your graveyard at random. You may cast a copy of that spell without paying its mana cost.

Whenever Witchfinder Artur enters or attacks, each opponent mills two cards and loses 2 life.
Whenever you cast an instant or sorcery spell, you may exile target instant or sorcery card with mana value less than that spell's mana value from an opponent's graveyard. If you do, cast a copy of the exiled card without paying its mana cost.

Whenever your Champion attacks, Xarr's Mockery gains indestructible until end of turn.

When Zakros General enters, choose one —
• You may return an enchantment you control to its owner's hand.
• Return target enchantment card from your graveyard to your hand.

Whenever a creature you control becomes a Rebel, Zolo's Right Horn deals 2 damage to each opponent.
{3}{R}: Zolo's Right Horn dares 5.

Trample
Rebels you control have trample.
{X}{G}: Another target creature you control dares twice X. Activate only as a sorcery.

Absolver of Ashes enters with a trample, first strike, menace, and +1/+1 counter on it.
At the beginning of your upkeep, remove a counter from Absolver of Ashes. If you can't, sacrifice it.

Absorbed Painter enters with a +1/+1 counter, a flying counter, and a vigilance counter on it.
Absorbed Painter can't attack or block as long as it has a counter on it.
{U}, {T}: You may move a counter from a creature you control to another creature you control. Activate only as a sorcery.

When Adaptive Hydra enters, teach it your choice of haste, menace, or vigilance. Then repeat this process X times.

Aggressor Model enters with a +1/+1 counter on it.