Gawain the Lifespinner

{t}: Add {g} or {u}. Spend this mana only to cast creature spells.
Whenever you cast a creature spell, if only mana produced by creatures was spent to cast it, copy
that spell. (A spell cast without paying its mana cost
won't trigger.)
"Life breeds life, my child. Let it sprout from your fingertips and bloom from your bones."