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).

Mimic Display - OSRS Wiki

Sticky' Sanders - OSRS Wiki

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

Toxic blowpipe - OSRS Wiki

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

Armadyl crossbow - OSRS Wiki

Mimic Pet, Redemption RSPS Wiki

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

Bow of faerdhinen - OSRS Wiki

Vardorvis - OSRS Wiki

Slaying The Master Mimic