14 cards where the card is tagged “triggers-at-cleanup-step”

Armor of Thorns (Vintage Masters #194)
Bounty of the Hunt (Masters Edition II #154)
Cunning (Exodus #28)
Grave Servitude (Mirage #126)
Lightning Reflexes (Dominaria Remastered #128)
Mystic Veil (Visions #38)
Necromancy (Murders at Karlov Manor Commander #131)
Parapet (Visions #14)
Relic Ward (Visions #16)
Soar (Mirage #93)
Spider Climb (Visions #120)
Thawing Glaciers (Vintage Masters #318)
Ward of Lights (Mirage #47)
Waylay (Urza's Saga #56)

Their mind whirled with grand plans, never thinking of what might happen if they got to the end of the list.