Try sorting your cards by color first
She's only an indestructible enchantment until your devotion to red and green is seven, at which point she also becomes a 4/5 creature
Lacking any evasion this is actually more of a defensive tool than an aggressive one in this archetype
SR Super Rare Dark Magic Mirror Force X TRAP When an opponent's monster declares an attack, or an opponent's monster effect is activated that would destroy a monster(s) on the field, while a monster that mentions "Shining Sarcophagus" is on the field: Destroy as many Attack Position monsters your opponent controls as possible, then if you control "Dark Magician", inflict 500 damage to your opponent for each monster destroyed, also for the rest of this turn after this card resolves, the first time each monster you control that mentions "Shining Sarcophagus" would be destroyed by battle or card effect, it is not destroyed
It is, unfortunately, not a good enough effect to add much value to this card
Once per turn, if control of this face-up card changes: Activate this effect