The Mimic/Strategies - OSRS Wiki

Upon completion of an elite or master clue scroll, the casket received has a chance of turning out to be a mimic chest. Mimic caskets can only be obtained from an elite or master reward casket after asking the strange casket to enable the chance to obtain a mimic casket (which is disabled by default).

Giant Mimic, RuneScape Wiki

Mimic Display - OSRS Wiki

General Graardor - OSRS Wiki

Vardorvis - OSRS Wiki

Karil's leatherskirt - OSRS Wiki

Spindel - OSRS Wiki

Grotesque Guardians - OSRS Wiki

Clue scroll (medium) - OSRS Wiki

OSRS' Treasure Trails Update: Mimic Boss Changes, Beginner Scroll Clues, Stackable Caskets and More

Mimic Guide, Athensps Wiki

TzTok-Jad - OSRS Wiki

Radagon of the Golden Order

Maps, The Mimic Wiki

3rd Age Pickaxe From Mimic : r/2007scape

Wintertodt - OSRS Wiki