Cast Dream's Grip by paying {U}, targeting Mystic Sanctuary.
Orvar and Archmage Emeritus trigger.
Resolve the Orvar trigger, creating a token copy of Mystic Sanctuary.
When the Mystic Sanctuary token enters the battlefield untapped, it triggers, putting Aquitect's Will from your graveyard onto the top of your library.
Resolve the Archmage Emeritus trigger, drawing Aquitect's Will from the top of your library.
Resolve Dream's Grip, untapping Mystic Sanctuary.
Activate Mystic Sanctuary and the Mystic Sanctuary token by tapping them, adding {U}{U}.
Cast Aquitect's Will by paying {U}, targeting Mystic Sanctuary.
Orvar and Archmage Emeritus trigger.
Resolve the Orvar trigger, creating a token copy of Mystic Sanctuary.
When the Mystic Sanctuary token enters the battlefield untapped, it triggers, putting Dream's Grip from your graveyard onto the top of your library.
Resolve the Archmage Emeritus trigger, drawing Dream's Grip from the top of your library.
Resolve Aquitect's Will, causing you to draw a card.
Repeat.

Infinite card draw

Infinite draw triggers

Near-infinite landfall triggers

Near-infinite magecraft triggers

Near-infinite blue mana

Near-infinite storm count

Near-infinite Island tokens

Orvar, the All-Form

Mystic Sanctuary

Dream's Grip

Aquitect's Will

Archmage Emeritus

Cast Dream's Grip by paying {U}, targeting Mystic Sanctuary.
Orvar and Case of the Ransacked Lab trigger.
Resolve the Orvar trigger, creating a token copy of Mystic Sanctuary.
When the Mystic Sanctuary token enters the battlefield untapped, it triggers, putting Aquitect's Will from your graveyard onto the top of your library.
Resolve the Case of the Ransacked Lab trigger, drawing Aquitect's Will from the top of your library.
Resolve Dream's Grip, untapping Mystic Sanctuary.
Activate Mystic Sanctuary and the Mystic Sanctuary token by tapping them, adding {U}{U}.
Cast Aquitect's Will by paying {U}, targeting Mystic Sanctuary.
Orvar and Case of the Ransacked Lab trigger.
Resolve the Orvar trigger, creating a token copy of Mystic Sanctuary.
When the Mystic Sanctuary token enters the battlefield untapped, it triggers, putting Dream's Grip from your graveyard onto the top of your library.
Resolve the Case of the Ransacked Lab trigger, drawing Dream's Grip from the top of your library.
Resolve Aquitect's Will, causing you to draw a card.
Repeat.

Case of the Ransacked Lab

Combos with "Aquitect's Will"