Hardened Scales Combos
Leech Bonder + Song of Freyalise + Hardened Scales
Wizard Class + Mindless Automaton + Hardened Scales
Vigor + Walking Ballista + Hardened Scales
Triskelion + Scythe of the Wretched + Hardened Scales
Spike Feeder + Unspeakable Symbol + Hardened Scales
Sigil of the New Dawn + Crystalline Crawler + Hardened Scales
Combo result
Infinite colored mana. Infinite ETB. Infinite LTB. Infinite sacrifice triggers. Infinite death triggers. Infinite storm count. Infinite mill.
Prerequisites
Have Sigil, Altar and Doubling Season on the battlefield. Have available in at least 3 different colors. crystalline crawler in hand.