Greg, Arch-Duke of Resonance

Ward {1}
Whenever you cast an instant or sorcery spell, you
may pay X, where X is that spells converted mana cost. If you do, add X mana of any colour if this
is the first time this ability has resolved this turn.
If its the second time, impulse X, you may play those cards this turn. If its the third, copy target instant or sorcery spell, you may choose new targets for the copy.