Rin and Seri, Inseparable

Rin and Seri, Inseparable

Legendary Creature — Dog Cat · {1}{R}{G}{W}

Whenever you cast a Dog spell, create a 1/1 green Cat creature token.
Whenever you cast a Cat spell, create a 1/1 white Dog creature token.
{R}{G}{W}, {T}: Rin and Seri deals damage to any target equal to the number of Dogs you control. You gain life equal to the number of Cats you control.