Infinite death triggersInfinite creature ETBInfinite creature LTBInfinite creature sacrifice triggersInfinite storm countInfinite colored manaInfinite mana permanents you control can produce
How it works
Cast Myr Battlesphere by paying 7.
Myr Battlesphere enters the battlefield, creating four 1/1 Myr creature tokens.
Activate Krark-Clan Ironworks by sacrificing Myr Battlesphere, adding 2.
Myr Battlesphere dies, triggering Dross Scorpion, untapping Hanna or any other artifact.
Repeat from step 3 for each of the four Myr creature tokens.
Activate Hanna by paying 3 and tapping it, returning Myr Battlesphere from your graveyard to your hand.