Vigilance
When "Brillantemental" enters the battlefield, destroy up to one target nonland permanent. Its controller creates a 3/3 colorless Golem artifact creature token.
When "Brillantemental" dies, return target artifact or enchantment card from your graveyard to your hand.

Companion—Each nonland card in your deck has an odd converted mana cost. (If this card is your chosen companion, you may cast it once from outside the game.)
If a source you control with an odd converted mana cost would deal damage, it deals double that damage instead.

You may cast spells that have a cycling ability from your graveyard.
If a card that has a cycling ability would be put into your graveyard from anywhere and it wasn't cycled, exile it instead.

Flying
Whenever Abyssal Specter deals damage to a player, that player discards a card.

Fabricate 1 (When this creature enters the battlefield, put a +1/+1 counter on it or create a 1/1 colorless Servo artifact creature token.)

Altar of the Lost enters the battlefield tapped.
: Add two mana in any combination of colors. Spend this mana only to cast spells with flashback from a graveyard.

, Exile cards from your graveyard equal to the number of opponents you have: Target creature card in your graveyard gains encore until end of turn. The encore cost is equal to its mana cost. (Exile the creature card and pay its mana cost: For each opponent, create a token copy that attacks that opponent this turn if able. They gain haste. Sacrifice them at the beginning of the next end step. Activate only as a sorcery.)

Sacrifice an artifact: Put a +1/+1 counter on Arcbound Ravager.
Modular 1 (This creature enters the battlefield with a +1/+1 counter on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Flying
At the beginning of each opponent's end step, that player chooses up to two creatures they control, then sacrifices the rest.

Flying, haste
At the beginning of the end step, return Archwing Dragon to its owner's hand.

, Pay 2 life: Draw a card.
At the beginning of your upkeep, if you have 5 or less life, you may transform Arguel's Blood Fast.

Enchant creature
Enchanted creature can't attack or block, and its activated abilities can't be activated.

Creatures you control have hexproof. (They can't be the targets of spells or abilities your opponents control.)
: Regenerate target creature.

Players can't cast spells from graveyards or activate abilities of cards in graveyards.
Whenever a creature dies, you gain 1 life.

[+2]: Draw a card. Each player mills two cards.
[−5]: Put target creature card from a graveyard onto the battlefield under your control.
[−11]: Gain control of all creatures target opponent controls.

Whenever Ashmouth Hound blocks or becomes blocked by a creature, Ashmouth Hound deals 1 damage to that creature.

Return target creature card from your graveyard to the battlefield. When you do, it fights up to one target creature you don't control. (Each deals damage equal to its power to the other.)

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When Bala Ged Scorpion enters the battlefield, you may destroy target creature with power 1 or less.

When Balduvian Horde enters the battlefield, sacrifice it unless you discard a card at random.