I wasnt active during previous appearances of the mechanic, but I am familiar with some of the cards with morph that are commonly played in Cube
Its a stellar inclusion in any auras/equipment/counters style decks
2023-06-16 The trigger event doesn't have to specifically refer to legendary permanents or to artifacts, nor does it have to specifically refer to when something "leaves the battlefield." For example, an ability that triggers "whenever a creature dies" would trigger twice if a legendary creature or an artifact creature dies while Gandalf the White is on the battlefield, as would an ability that triggers "whenever a permanent is put into a graveyard from the battlefield." 2023-06-16 Look at each legendary permanent and each artifact as it exists on the battlefield, taking into account continuous effects, to determine whether any triggered abilities will trigger multiple times
Their Number Is LegionTheir Number Is Legion costs a lot for what it does, but it's at least a welcome sight when you need that late game spell to push you over the top
Brilliant Stars Astral Radiance Pokmon GO Lost Origin Silver Tempest Crown Zenith Scarlet & Violet (SVI) Paldea Evolved (PAL) Obsidian Flames (OBF) Scarlet & Violet151 (MEW) Paradox Rift (PAR) Paldean Fates (PAF) Temporal Forces (TEF) Twilight Masquerade (TWM) Shrouded Fable (SFA) Stellar Crown (SCR) Each of the sets above has a regulation mark of F or later