Isran, Grizzled Commander

Isran and other creature spells you cast cost {1} less for each creature you control but don't own.
Creatures you control have Vigilance and Lifelink.
At the beginning of each player's combat, that
player may choose target creature they control. If
they do, you gain control of that creature for as
long as you control Isran. Whenever that creature
deals combat damage, it's owner gains that much
life and creates a Gold token.