Dreamstone Hedron Combos
Karn, the Great Creator + Voltaic Construct + Dreamstone Hedron
Myr Welder + Staff of Domination + Dreamstone Hedron
Myr Welder + Voltaic Construct + Dreamstone Hedron
Pentavus + Dross Scorpion + Dreamstone Hedron
Rod of Absorption + Echo Storm + Dreamstone Hedron
Combo result
Infinite copies of artifacts you control. Infinite colorless mana. Infinite storm count. Infinite magecraft triggers. Infinite card draw. Infinite draw triggers.
Prerequisites
Echo Storm in hand. All permanents on the battlefield. You've cast your commander from the command zone at least twice. {U}{U} available.