name: Surge of Strength
originalText: Choose and discard a red or green card from your hand to have target creature gain trample and get +X/+0 until end of turn, where X is equal to that creature's casting cost.
printings: ALL, JP1
text: As an additional cost to cast this spell, discard a red or green card.
  Target creature gains trample and gets +X/+0 until end of turn, where X is that creature's mana value.
type: Instant