Players play with the top card of their libraries revealed.
, Sacrifice this artifact: Target player shuffles.

Haste
Sacrifice this creature: Another target creature gains haste until end of turn.

Put a +1/+1 counter on each of X target creatures.

: Add .

, Sacrifice this artifact: Exile target player's graveyard.
When this artifact is put into a graveyard from the battlefield, you may pay . If you do, draw a card.

Counter target spell unless its controller pays .

As long as there are two or more instant and/or sorcery cards in your graveyard, this creature gets +1/+0 and has haste. (It can attack and as soon as it comes under your control.)

As an additional cost to cast this spell, sacrifice a creature.
Destroy target creature.

Target creature gets +2/+1 and gains haste until end of turn. Scry 1.

Target attacking creature gets +3/+3 until end of turn. If it's an artifact creature, it gains trample until end of turn.

Target creature gets -1/-1 until end of turn.
Dredge 3 (If you would draw a card, you may mill three cards instead. If you do, return this card from your graveyard to your hand.)

Until end of turn, whenever a player taps a Swamp for mana, that player adds an additional .

Sacrifice this enchantment: Target creature gets +3/+3 until end of turn.

Counter target spell with mana value 2.

When this creature enters, investigate. (Create a Clue token. It's an artifact with ", Sacrifice this token: Draw a card.")

Buyback (You may pay an additional as you cast this spell. If you do, put this card into your hand as it resolves.)
Target creature gets +2/+2 until end of turn.

Target creature gets +1/+2 and gains deathtouch until end of turn. (Any amount of damage it deals to a creature is enough to destroy it.)

Kicker (You may pay an additional as you cast this spell.)
When this creature enters, if it was kicked, creatures you control get +1/+0 and gain haste until end of turn.

This creature enters tapped.

Target creature gets -1/-1 until end of turn.

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)
Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

Outlast (, : Put a +1/+1 counter on this creature. Outlast only as a sorcery.)

: Creatures you control get +1/+1 and gain vigilance until end of turn. Activate only during your turn. (Attacking doesn't cause them to tap.)

Prevent all combat damage X target creatures would deal this turn.

Flying

Target creature becomes red and gains haste until end of turn. (It can attack and this turn.)
Draw a card.

When this creature dies, you gain 2 life.
, Sacrifice this creature: Exile target noncreature artifact or noncreature enchantment.

Lightning Bolt deals 3 damage to any target.

Whenever you cast a creature spell, tap target creature.

Devoid (This card has no color.)
Target creature can't be blocked this turn.
Draw a card.

Equipped creature gets +3/+3 and has protection from each color that's not in your commander's color identity.
Equip commander
Equip

: Creatures you control get +1/+1 until end of turn.

, : Each player reveals the top card of their library. You may put the revealed cards into their owners' graveyards. If you don't, each player draws a card.

Enchant Mountain
: Enchanted Mountain becomes a 6/1 red Spirit creature until end of turn. It's still a land.
When enchanted Mountain is put into a graveyard, you may return this card from your graveyard to your hand.

Exile target creature. Its controller may search their library for a basic land card, put that card onto the battlefield tapped, then shuffle.