When The Great Henge enters, Surge Conductor triggers, putting one +1/+1 counter on Arcbound Reclaimer and at least two additional artfacts you control.
Activate The Great Henge by tapping it, adding and gaining 2 life.
Activate Krark-Clan Ironworks by sacrificing The Great Henge, adding CC.
Activate Arcbound Reclaimer by removing a +1/+1 counter from it, putting The Great Henge from your graveyard on top of your library.
Activate Iron Spider's last ability by paying 2 and removing two +1/+1 counters from artifacts you control, drawing The Great Henge.