Commander creatures you own have "At the beginning of your upkeep, exile the top card of your library. This creature gets +X/+0 until end of turn, where X is that card's mana value. You may play that card this turn."

Destroy target creature if it has the least power or is tied for least power among creatures on the battlefield.

You may exile a green card from your hand rather than pay this spell's mana cost.
Distribute three +1/+1 counters among one, two, or three target creatures. For each +1/+1 counter you put on a creature this way, remove a +1/+1 counter from that creature at the beginning of the next cleanup step.

: This creature deals 1 damage to target player or planeswalker.

First strike, haste
Sanctified Rules of Combat — When this creature enters, each opponent faces a villainous choice — That opponent discards all the cards in their hand, then draws that many cards minus one, or this creature deals damage to that player equal to the number of cards in their hand.

Enchant creature
Enchanted creature gets +2/+2 and has flying and "Sacrifice two other creatures: Regenerate this creature." (The next time the creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)

Return target creature to its owner's hand. You create a token that's a copy of that creature.

Kicker and/or (You may pay an additional and/or as you cast this spell.)
When this enchantment enters, you gain 3 life for each time it was kicked.
Whenever one or more creatures you control deal combat damage to a player, you may reveal the top card of your library and put it into your hand. If you do, you lose life equal to its mana value.

When this creature enters, each player sacrifices a creature of their choice.

All Sliver creatures get +0/+2.

Shake the Foundations deals 1 damage to each creature without flying.
Draw a card.

(: Add .)

This spell can't be copied.
Choose one. If an opponent has eight or more cards in their graveyard, you may choose both instead.
• Copy target spell. You may choose new targets for the copy. (A copy of a permanent spell becomes a token.)
• Create a token that's a copy of target creature.

First strike
: Until end of turn, this creature becomes a Dragon, gets +5/+3, and gains flying and trample.

Destroy target artifact or enchantment. You gain 4 life.

When this creature enters, you may return target enchantment card from your graveyard to your hand.

Create two 1/1 red Goblin creature tokens.
Storm (When you cast this spell, copy it for each spell cast before it this turn.)

This land enters tapped.
When this land enters, you gain 1 life.
: Add or .

(: Add .)

Choose one —
• Destroy target creature with mana value 3 or less.
• Return target creature to its owner's hand.