If it's a nonland card, create a 2/2 black Rogue creature token
Norn's Annex , Propaganda , Ghostly Prison , Archon of Absolution , Baird, Steward of Argive , Sphere of Safety and Windborn Muse all stop opponents attacking you unless they pay a certain amount per creature
If theres been a battlefield sweeper, then well likely start on top of the heap, with our best creature and two best modifications
* While supplies last
It can still be countered and interact with the stack like the spell normally would if it was cast for its original cost
The poster cub for main-phase utility here is Duskwatch Recruiter, who has carved out a storied career every from Standard, to Pioneer, to Modern, to Cube, to Legacy