Sylmis, Catalyst of Change

Haste, Flying, Trample
{2}{r}: Put a face up card you own in exile with an
Overgrowth counter on it into your graveyard.
You deal damage to any target equal to that
card's converted mana cost.
{u}: Until the end of the turn, you may cast face
up cards you own in exile with Overgrowth
counters on them. Those cards cost {3} less to cast.
{2}{u/r}{u/r}: Transform Sylmis, Catalyst of Change.