Torrent of Thought

Suspend 10—{u}{u}
Whenever you cast a spell with lesser mana value
than the spell most recently cast this turn, if
Torrent of Thought is suspended, you may
remove a time counter from Torrent of Thought.
Until end of turn, you may cast spells with mana values less than the mana value of the spell you
most recently cast this turn without paying their
mana costs.