Vultavian Springs

Whenever you counter a spell, exile that spell
and put a verse counter on Vultavian Springs.
{x}{u}{u}, remove X verse counters from Voltavian Springs: You may cast any number of spells exiled under Vultavian Springs whose converted mana cost is equal to or less than X.
It is nicknamed Spring of Spells because every spell that is cast is recorded in its memory.