Choose one —
• Counter target red spell.
• Destroy target red permanent.

Whenever you cast a historic spell, investigate. This ability triggers only once each turn. (Artifacts, legendaries, and Sagas are historic. To investigate, create a Clue token. It's an artifact with ", Sacrifice this token: Draw a card.")
Doctor's companion (You can have two commanders if the other is the Doctor.)

When this artifact enters, create a Blood token. (It's an artifact with ", , Discard a card, Sacrifice this token: Draw a card.")
, , Sacrifice this artifact: Return up to two target creature cards from your graveyard to your hand.

Protection from black
Threshold — As long as there are seven or more cards in your graveyard, this creature gets +3/+3 and has flying.

Enchant creature
Enchanted creature has flying, first strike, and vigilance.

: Add .
, : Exile target attacking creature an opponent controls. At the beginning of the next end step, return it to the battlefield tapped under its owner's control.

Flying
When this creature dies, you may put it on top of its owner's library.

You may cast up to one target instant card and/or up to one target sorcery card from your graveyard each with mana value X or less without paying their mana costs. If a spell cast this way would be put into your graveyard, exile it instead. If X is 10 or more, copy each of those spells twice. You may choose new targets for the copies.

Flash
If a nontoken creature would enter and it wasn't cast, exile it instead.

Flying, deathtouch, lifelink
Nighthawk Scavenger's power is equal to 1 plus the number of card types among cards in your opponents' graveyards.

Equipped creature gets +2/+0.
Whenever equipped creature deals combat damage to a player, create a token that's a copy of this Equipment.
Equip

, : Target player mills a card. (They put the top card of their library into their graveyard.)
Tap four untapped Advisors you control: Target player mills twelve cards.
A deck can have any number of cards named Persistent Petitioners.

: Search your library for a card, put it into your graveyard, then shuffle. If it's an instant or sorcery card, put a +1/+1 counter on this creature.

, , Sacrifice this artifact: Search your library for a land card, reveal it, put it into your hand, then shuffle.

At the beginning of each player's upkeep, this artifact deals 1 damage to that player.
: Prevent the next 1 damage that would be dealt by this artifact this turn.

If this creature would be destroyed, regenerate it.
Tap any number of untapped creatures you control other than this creature with total power 10 or greater: This creature gets +20/+20 until end of turn.

At the beginning of your upkeep, create a Forest land token.

You may return an Island you control to its owner's hand rather than pay this spell's mana cost.
Counter target spell unless its controller pays .

Destroy all creatures.

Whenever one or more artifact creatures you control deal combat damage to a player, you get (an energy counter).
Pay : Create a tapped 3/3 colorless Robot artifact creature token.