Sultai Scavenger

Delve (Each card you exile from your graveyard while casting this spell pays for {1}.)
Flying

Bone Picker

This spell costs {3} less to cast if a creature died this turn.
Flying, deathtouch

Myr Enforcer

Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.)

Plains

Foul-Tongue Shriek

Target opponent loses 1 life for each attacking creature you control. You gain that much life.

Vault of Whispers

Village Rites

As an additional cost to cast this spell, sacrifice a creature.
Draw two cards.

Ancient Den

Blood Pet

Thraben Charm

Choose one —
• Thraben Charm deals damage equal to twice the number of creatures you control to target creature.
• Destroy target enchantment.
• Exile any number of target players' graveyards.

Refurbished Familiar

Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.)
Flying
When Refurbished Familiar enters, each opponent discards a card. For each opponent who can't, you draw a card.

Mirrodin Avenged

Destroy target creature that was dealt damage this turn.
Draw a card.

Raffine's Informant

When Raffine's Informant enters, it connives. (Draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on this creature.)

Thraben Inspector

When Thraben Inspector enters, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.")

Novice Inspector

When Novice Inspector enters, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.")