Tatiana, the Lightshow

As long as two or more spells have been cast this
turn, spells you control can't be countered.
At the beginning of each end step, you gain 1 life
for each spell cast this turn.
{3}{u}{u}: Return target noncreature spell to its
owner's hand unless its controller pays {1}. This
ability costs {3} less to activate if it targets a spell
you control.