Menace
Other Orcs and Goblins you control have menace.
At the beginning of combat on your turn, amass Orcs 2. (Put two +1/+1 counters on an Army you control. It's also an Orc. If you don't control an Army, create a 0/0 black Orc Army creature token first.)

Exile a creature card from your graveyard. Create a token that's a copy of it. It gains haste until end of turn. Exile it at the beginning of the next end step.
Storm (When you cast this spell, copy it for each spell cast before it this turn.)

Damage can't be prevented this turn. If a source you control would deal damage this turn to an opponent or a permanent an opponent controls, it deals triple that damage instead.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Equipped creature has menace, deathtouch, annihilator 1, and "Whenever an opponent sacrifices a nontoken permanent, put that card onto the battlefield under your control unless that player pays 3 life." (Whenever a creature with annihilator 1 attacks, defending player sacrifices a permanent of their choice.)
Equip

Fire a Nerf® blaster until empty at target library from at least two meters away. For each card knocked off that library, put it into its owner's graveyard and Nerf War deals ½ damage to that player. (Foam darts only.)

Flying
Whenever Chaos Balor attacks or dies, choose two. Each mode must target a different player.
• Target player discards all the cards in their hand, then seeks that many nonland cards.
• Chaos Balor deals 2 damage to target player and they create two Treasure tokens.
• Chaos Balor deals 2 damage to each creature target player controls. Those creatures perpetually get +2/+0.

First strike
At the beginning of combat on your turn, target creature you control gains first strike and gets +X/+0 until end of turn, where X is the number of creature cards in your graveyard.

Double strike
When this creature enters or specializes, return up to two target creature cards with total mana value 3 or less from your graveyard to the battlefield.

Whenever you cast an instant or sorcery spell, each opponent loses 2 life.

Whenever you cast an instant or sorcery spell, put two +1/+1 counters on target creature.

When this creature specializes, seek a creature card and put it into your graveyard, then conjure two duplicates of it into your graveyard.
At the beginning of combat on your turn, target creature you control gets +X/+0 until end of turn, where X is the number of creature cards in your graveyard.

Specialize
Whenever Skanos, Dragon Vassal attacks, another target attacking creature gets +X/+0 until end of turn, where X is Skanos's power.

Menace
At the beginning of combat on your turn, target creature you control gains menace and gets +X/+0 until end of turn, where X is the number of creature cards in your graveyard.

Double strike
When this creature enters or specializes, conjure a duplicate of a random creature card from an opponent's library into your hand. It perpetually gains prismatic.

Double strike
When this creature enters or specializes, other creatures you control and creature cards in your hand perpetually get +1/+1.

Specialize
When Wyll, Pact-Bound Duelist enters, gain control of target artifact or creature an opponent controls with mana value 4 or less until the end of your next turn.

Whenever you attack, up to one target attacking creature can't be blocked this turn. At the beginning of the next end step, return that creature to its owner's hand. If you do, create a 1/1 white Soldier creature token.

Whenever you cast an instant or sorcery spell, Gale, Storm Conduit perpetually gains "Creatures you control get +1/+0."

Whenever you attack, up to one target attacking creature can't be blocked this turn. At the beginning of the next end step, return that creature to its owner's hand. If you do, create a Treasure token.

Trample
At the beginning of combat on your turn, target creature you control gains trample and gets +X/+0 until end of turn, where X is the number of creature cards in your graveyard.

Whenever you cast an instant or sorcery spell, draw a card, then discard a card.

Whenever you cast an instant or sorcery spell, create a 1/1 white Pegasus creature token with flying.

Haste, double team (When this creature attacks, conjure a duplicate into your hand, then both of them perpetually lose double team.)

Whenever you attack, up to one target attacking creature can't be blocked this turn. At the beginning of the next end step, return that creature to its owner's hand. If you do, a creature of your choice an opponent controls perpetually gets -1/-0.

Molting Exoskeleton — When Hook Horror dies, it perpetually gets -1/-1. Then if that card's toughness is 1 or greater, return it to the battlefield under its owner's control.

Double strike
When this creature enters or specializes, create two 1/1 white Soldier creature tokens.

Whenever you attack, up to one target attacking creature can't be blocked this turn. At the beginning of the next end step, return that creature to its owner's hand. If you do, it perpetually gets +1/+1.

Whenever you attack, up to one target attacking creature can't be blocked this turn. At the beginning of the next end step, return that creature to its owner's hand. If you do, each opponent loses 2 life.

Double strike
When this creature enters or specializes, seek a nonland permanent card with mana value 3 or less.

At the beginning of combat on your turn, target creature you control gets +X/+0 until end of turn, where X is the number of creature, instant, and sorcery cards in your graveyard.

Defender (This creature can't attack.)
: This creature gets +1/+0 until end of turn.
: This creature gets +0/+1 until end of turn.
: This creature deals 1 damage to target creature without flying that's attacking you.

When you control no Islands, sacrifice Skeleton Ship.
: Put a -1/-1 counter on target creature.

At end of combat, destroy all creatures blocking or blocked by this creature.

Target player chooses three cards from their hand and puts them on top of their library in any order.

Put target creature card from a graveyard onto the battlefield under your control.

Defender, flying, first strike
Cumulative upkeep (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)