When an opponent controls an untapped creature, activate a mana-producing permanent by tapping it, adding at least {1}.
Activate Mind Over Matter by discarding a card, targeting the mana-producing permanent.
Curator of Mysteries triggers, causing you to scry 1.
Elvish Mariner triggers, causing you to tap an untapped creature an opponent controls.
Hylda of the Icy Crown triggers, causing you to pay {1} to scry 2 and draw a card.
Elvish Mariner triggers, causing you to tap nothing.
Resolve the Mind Over Matter ability from step 2, untapping the permanent.
Repeat as desired.

Tap all creatures opponents control during each turn

Hylda of the Icy Crown

Mind Over Matter

Elvish Mariner

Curator of Mysteries

When an opponent controls an untapped creature, activate Skirge Familiar by discarding a card, adding {B}.
Curator of Mysteries triggers, causing you to scry 1.
Elvish Mariner triggers, causing you to tap an untapped creature an opponent controls.
Hylda of the Icy Crown triggers, causing you to pay {1} to scry 2 and draw a card.
Elvish Mariner triggers, causing you to tap nothing.
Repeat as desired.

Combos with "Elvish Mariner"