Storm Giant

Vigilance, Reach and Prowess
Whenever Storm Giant deals combat damage to
an opponent or kills a creature create a clue token
then you may sacrifice those clue tokens.
Once per turn you may copy the next Instant or Sorcery spell you cast with mana value X or less,
where X is the number of clue tokens sacrificed
this turn.
Incentive- If 2 or more treasures were spent to
cast this it has Trample.