Compost - [Foil] Urza's Destiny (UDS)Whenever a black card is put into an opponent's graveyard from anywhere, you may draw a card. A fruit must rot before its seed can sprout. Yavimaya saying

Whenever a creature attacks

flip a coin for each creature that isn't a Demon

Whenever Karona attacks

If this creature is a Wizard

where X is your devotion to blue

Remove three quest counters from Ior Ruin Expedition and sacrifice it: Draw two cards

(The spell has no effect

{3}: Remove an ice counter from Dark Depths

Whenever Burakos

Skyshark Rider and it deals 1 damage to each opponent

but I believe a more mundane power source might suffice

"In Barrin's name