When playing Get Excited, when do you choose and reveal what to discard, and what happens if it gets defied?

Ruling: You choose what to discard on resolution of Get Excited, not when you cast it. Your opponent will not know how much damage Get Excited will do before it resolves. If Get Excited gets defied, you do not have to discard.

Sequence:

• Cast Get Excited and select target
• If it resolves, choose what to discard at resolution
• If it gets defied, no discard occurs

Nuances:

• You must select the target when you cast the spell, but the discard choice happens later at resolution