Void Mirror

Whenever a player casts a spell, if no colored mana was spent to cast it, counter that spell.

Leyline of the Void

If Leyline of the Void is in your opening hand, you may begin the game with it on the battlefield.
If a card would be put into an opponent's graveyard from anywhere, exile it instead.

Leyline of the Guildpact

If Leyline of the Guildpact is in your opening hand, you may begin the game with it on the battlefield.
Each nonland permanent you control is all colors.
Lands you control are every basic land type in addition to their other types.

Voidslime

Counter target spell, activated ability, or triggered ability. (Mana abilities can't be targeted.)

Ceremonious Rejection

Leyline of Sanctity

If Leyline of Sanctity is in your opening hand, you may begin the game with it on the battlefield.
You have hexproof. (You can't be the target of spells or abilities your opponents control.)

Seismic Spike

Stone Rain

Sol Ring

Arcane Signet

{T}: Add one mana of any color in your commander's color identity.

Selesnya Signet

Gruul Signet

Simic Signet

Dimir Signet

Plains

Golgari Signet

Orzhov Signet

Izzet Signet

Azorius Signet

Boros Signet

Child of Alara

Trample
When Child of Alara dies, destroy all nonland permanents. They can't be regenerated.

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