Deceiver Exarch

Flash (You may cast this spell any time you could cast an instant.)
When Deceiver Exarch enters the battlefield, choose one —
• Untap target permanent you control.
• Tap target permanent an opponent controls.

Cruel Tutor

Search your library for a card, then shuffle and put that card on top. You lose 2 life.

Swamp

Impact Tremors

Whenever a creature enters the battlefield under your control, Impact Tremors deals 1 damage to each opponent.

Kiki-Jiki, Mirror Breaker

Haste
{T}: Create a token that's a copy of target nonlegendary creature you control, except it has haste. Sacrifice it at the beginning of the next end step.

Mountain

Demonic Tutor

Search your library for a card, put that card into your hand, then shuffle.

Vampiric Tutor

Island

Grim Tutor

Search your library for a card, put that card into your hand, then shuffle. You lose 3 life.