Rings of Brighthearth + Voltaic Key + Candelabra of Tawnos + High Tide
Rings of Brighthearth
Voltaic Key
Candelabra of Tawnos
High Tide
Infinite mana artifacts you control can produceInfinite mana lands you control can produceInfinite untap of artifacts you controlInfinite untap of lands you control
How it works
Cast High Tide by paying , causing all Islands to add an additional when they are tapped for mana this turn.
Activate two Islands you control by tapping them, adding .
Activate Candelabra of Tawnos by paying 2 and tapping it.
Rings of Brighthearth triggers, causing you to pay 2 to copy Candelabra of Tawnos' ability.
Resolve the first Candelabra of Tawnos ability, untapping the two Islands.
Activate two Islands you control by tapping them, adding .
Resolve the second Candelabra of Tawnos ability, untapping the two Islands.
Activate Voltaic Key by paying 1 and tapping it.
Rings of Brighthearth triggers, causing you to pay 2 to copy Voltaic Key's ability.
Resolve both Voltaic Key abilities, untapping Voltaic Key and Candelabra of Tawnos.