Tamaria Jinx, Wildly Lucky

Magecraft —Whenever you cast or copy an
instant or sorcery spell, you get an experience
counter.
Whenever you roll a d20, increase the result
up to X where X is the amount of experience
counters you have.
{u}{r}, {t}: Roll a d20.
1-14/ Create a treasure token.
15+ / Copy up to one target instant or
sorcery spell. You may choose new
targets for the copy.