Gojo, the Strongest

Gojo costs {1} less to cast for each spell you've cast this turn.
Spells you cast that are 2 or more colors gain cascade.
Whenever you cast a spell, choose 1:
-Spells you cast this turn cost {1} less to cast this turn.
-Spells you cast this turn cost {x} less to cast this turn, where {x} is the amounts and types of colored mana that spell cost. This ability only affects colored mana.