MTG >Combos >Thornbite Staff +Phyrexian Altar +Su-Chi +Feldon of the Third Path +

Equip Feldon with Thornbite Staff and activate their ability to create a token that is a copy of Su-Chi Sacrifice the token with Phyrexian Altar to add one red mana Thornbite Staff ability will trigger, untap Feldon Su-Chi's ability will trigger, add four mana Repeat the process for infinite mana.