Xearth, Magus Ascendant

Ascend
Magecraft—Whenever you cast or copy an instant
or sorcery spell, add {u}, {b}, or {r} to your mana
pool.
As long as you have the city's blessing, copy the
first instant or sorcery spell you cast each turn
from anywhere other than your hand.
"I see the forces that hold the universe together."