Tito, The Aesthete

Extort (Whenever you cast a spell you may pay {w/b}.
If you do, each opponent loses 1 life and you gain that much life.)

Alternative art and white bordered spells you control cost {1} less to cast.

Each time you cast a spell you gain X life, where X
is the difference between the spell's mana cost and
the amount of mana spent to cast it.