Deceiver Exarch

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

Dispel

Peek

Look at target player's hand.
Draw a card.

Pestermite

Flash
Flying
When Pestermite enters, you may tap or untap target permanent.

Spell Snare

Electrolyze

Electrolyze deals 2 damage divided as you choose among one or two targets.
Draw a card.

Remand

Counter target spell. If that spell is countered this way, put it into its owner's hand instead of into that player's graveyard.
Draw a card.

Mountain

Cryptic Command

Choose two —
• Counter target spell.
• Return target permanent to its owner's hand.
• Tap all creatures your opponents control.
• Draw a card.

Flame Slash

Flame Slash deals 4 damage to target creature.

Splinter Twin

Enchant creature
Enchanted creature has "{T}: Create a token that's a copy of this creature, except it has haste. Exile that token at the beginning of the next end step."