I cast Song of Blood, and the cards revealed are Swamp, Grizzly Bears, Grizzly Bears, and Viscera Dragger. Once it resolves, I unearth Viscera Dragger. When I declare attackers, Song of Blood's delayed triggered ability is put on the stack. When it resolves, will my attacking creatures get +3/+0 or +2/+0?

My initial inclination is +3/+0, as Song of Blood's delayed triggered ability cares about how many creature cards were put in the graveyard when Song of Blood resolved.

The reason I'm asking this question is because Magic Online gives the attacking creatures +2/+0, and I can not conclude if this is a bug or me misunderstanding the rules.

Thank you.

+3/+0.

The value of that number is determined as the spell resolves. The fact that it creates a delayed triggered ability doesn't matter here; when the delayed trigger resolves, it still knows only as much as what created it in the first place. The number won't change.

Daniel Kitachewsky
L3, Paris, France
Rules NetRep