Alawukuk, Vibing Prophet

Creatures your opponents control are Goblins
in addition to their other types.
Whenever one or more Goblin attack,
discard a card a card then draw a card.
If the discarded card was a Goblin,
each opponent loses 1 life.
You may cast Goblin spells from your graveyard
if an opponent lost 3 or more life this turn.