Unblinking Observer | Creature | Homunculus | {T}: Add {U}. Spend this mana only to pay a disturb cost or cast an instant or sorcery spell. | Filip Burburan
2.5 LSV
Baithook Angler | Creature | Human Peasant | Disturb {1}{U} (You may cast this card from your graveyard transformed for its disturb cost.) | Uriah Voth
3.0 LSV
Shipwreck Sifters | Creature | Spirit | When Shipwreck Sifters enters the battlefield, draw a card, then discard a card.
Whenever you discard a Spirit card or a card with disturb, put a +1/+1 counter on Shipwreck Sifters. | Svetlin Velinov
1.5 LSV