Haste
When Wildfang Cavalier dies, create a 3/1 red Dinosaur creature token. It gains haste until end of turn. If it's your combat phase, there is an additional combat phase after this phase.

Trample
When Imperfect Fugisaur enters, you may sacrifice an artifact. If you do, it gains haste until end of turn.
Whenever Imperfect Fugisaur deals combat damage to a player, that player sacrifices an artifact. If they can't, you draw a card.

Distribute three +1/+1 counters among up to three target creatures.

Level up {1}{W}
[level 2-3] This creature has first strike during your turn.
[level 4+] This creature has first strike during your turn.

{2}, Sacrifice another creature: Put a +1/+1 counter on Coward-Eater. Draw a card.

When this creature enters, you may return another creature you control to its owner's hand. If you do, draw a card.

Ward {2}
At the beginning of your upkeep, put a +1/+1 counter on Decavolt Reactor.

Hexproof from permanents

Search your library for a basic land card, put it onto the battlefield, then shuffle.

{T}: Add {C}.
{T}: Add one mana of any color. If you don't control a Weather, spend this mana only to cast a Weather spell.

When this land enters, sacrifice it. If you do, search your library for a basic Forest or Island card, put it onto the battlefield tapped, then shuffle.
{1}{G}{G}{U}{U}, Discard this card: Create two tapped tokens that are copies of target land.

This land enters tapped.
{2}{B}{G}, {T}: Surveil 1.

Destroy target attacking or blocking creature with power 3 or greater.

Bleeding Out deals 3 damage to any target. Excess damage dealt to a creature or planeswalker this way is dealt to its controller instead.

Whenever a creature you control leaves the battlefield without dying, you may put a permanent card with lesser mana value from your hand onto the battlefield.

You gain 2 life and draw two cards.
Cycling {2}

When Penrath Ambassador enters, target creature must be blocked each combat this turn if able and target creature can't block this turn.
Basic landcycling {1}{G}

Destroy target artifact or enchantment.
Cycling {2}

As an additional cost to cast spells during an opponent's turn, you may pay {U} and reveal Promethean Jaxl from your hand. If you do, you get a lurk counter.
Flash
Promethean Jaxl enters tapped.
When Promethean Jaxl enters, you draw a card for each lurk counter you have, then you lose all lurk counters.

{G}, Sacrifice this creature: Exile target artifact, enchantment, or card from a graveyard. If you own that permanent or card, cache it instead.

When Hostage Situation enters, target opponent reveals their hand. Exile a nonland card from it and up to one creature card from your graveyard. When Hostage Situation is no longer on the battlefield, return the exiled cards to their owner's hands.

Trample
Whenever Arena Champion attacks, create a Weapon token, then attach it to an attacking creature you control.

Surveil 2. When you do, return up to one target creature card from your graveyard to the battlefield.

Whenever another nontoken permanent you control is returned to hand, you may create a token that's a copy of it. Do this only once each turn.
Each creature card with mana value 3 or less in your hand has ninjutsu {G}{U}.

Haste
When Summoning Swords enters, search your library for a creature card with mana value X or less, put it onto the battlefield, then shuffle.
Spellcharge 7