Whenever you sacrifice Effluence Devourer or another creature, it perpetually gains ", Exile this card from your graveyard: Create an X/X green Ooze creature token, where X is this card's power. Activate only as a sorcery."
Blitz (If you cast this spell for its blitz cost, it gains haste and "When this creature dies, draw a card." Sacrifice it at the beginning of the next end step.)

Alliance — Whenever one or more other creatures enter the battlefield under your control, seek a land card, then put it onto the battlefield tapped. This ability triggers only once each turn.

When Spara's Bodyguard enters the battlefield, you may choose a creature card in your hand. If you do, it perpetually gains "This creature enters the battlefield with an additional shield counter on it." Otherwise, put a shield counter on Spara's Bodyguard. (If it would be dealt damage or destroyed, remove a shield counter from it instead.)
At the beginning of each combat, Spara's Bodyguard gets +1/+1 until end of turn for each shield counter among other creatures you control.

When this creature enters the battlefield, it connives. (Draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on this creature.)
Whenever you discard one or more cards, seek a card that shares a card type with one of the discarded cards. This ability triggers only once each turn.

When Spelldrain Assassin enters the battlefield, choose an instant or sorcery card in your hand. It perpetually gains casualty 2. (As you cast this spell, you may sacrifice a creature with power 2 or greater. When you do, copy this spell and you may choose a new target for the copy.)