Mathew's Vape

{t}: Enchant target creature
until your next turn. Based on the
amount of {g} mana spent, the creature gains:
{g}: +1/+1 and lifelink.
{g}{g}: +2/+2 and "Whenever this creature
deals damage, draw a card."
{g}{g}{g} or more: +3/+3, trample, and hexproof.
The creature doesn't untap during its controller's
next untap step.