infinite red mana, then infinite any color using soulfire

Spells cost less to cast.

: Put a charge counter on this artifact. Remove a charge counter from this artifact: Add one mana of any color.

Add .

+1: Create a 1/1 white Soldier creature token. +1: Target creature gets +3/+3 and gains flying until end of turn. −8: You get an emblem with "Artifacts, creatures, enchantments, and lands you control have indestructible."

Activated abilities of creatures you control cost less to activate. This effect can't reduce the mana in that cost to less than one mana.

Instant and sorcery spells you cast cost less to cast.