Irelia, the Blade Dancer

Irelia, the Blade Dancer enters the battlefield
with ten blade counters.
Whenever you draw a card, add a blade counter
to Irelia.
Whenever you cast an instant or sorcery spell,
you may pay its mana cost using blade counters
on Irelia instead of mana. Damage you deal from spells using Irelia's blade counters is increased
by 1 for each blade counter spent to
pay for mana cost.