If I cast a card with overload from my graveyard using Past in Flames can I cast it for it's overload cost, or must it be just single target at that point? For instance Mizzium Mortars
The Basic rulebook, read it! A lot of basic questions are answered there!
How to autocard :
Type [c]Black Lotus[/c] to get Black Lotus.
Type [c=Black Lotus]The Overpowered One[/c] to get The Overpowered One.