({5} magic symbol) ({R} magic symbol) ({R} magic symbol) plus commander tax if applicable available.
Steps
Cast
Etali either from your hand or the command zone by paying ({5} magic symbol) ({R} magic symbol) ({R} magic symbol) plus commander tax if applicable.
When
Etali enters, it triggers.
Holding priority, activate
Goblin Bombardment by sacrificing
Etali.
When
Etali dies,
Yedora triggers, returning
Etali from your graveyard to the battlefield face-down as a Forest land.
Resolve the
Goblin Bombardment ability.
Holding priority, activate
Etali by tapping it, adding ({G} magic symbol) .
Resolve the
Etali trigger from step 2, exiling cards from the top of each library until each player has exiled a nonland card, and causing you to cast any number of those cards without paying its mana cost.
For each card cast,
Toph's second ability triggers once.
Resolve the first
Toph trigger, earthbending
Etali.
Resolve any remaining triggers, earthbending any other lands you desire. If you do not want to earthbend other lands, target
Etali with all remaining triggers.
Activate
Goblin Bombardment by sacrificing
Etali.
When
Etali dies,
Toph and
Yedora trigger.
Resolve the
Yedora trigger, choosing not to return
Etali.
Resolve the
Toph trigger, returning
Etali from your graveyard to the battlefield tapped.
Repeat from step 2.
Resolve all
Goblin Bombardment abilities from step 11.
Results
Cast all spells in your library.
Cast any number of spells from opponents' libraries.