Artifact Durendal (UTR)

2 Level 5 monsters
Once per turn, during either player's turn, you can activate 1 of these effects.
When a monster effect is activated on the field, OR when a Normal Spell/Trap Card is activated: You can detach 1 Xyz Material from this card; the activated effect becomes "Destroy 1 Spell/Trap Card your opponent controls".
You can detach 1 Xyz Material from this card; each player with a hand shuffles their entire hand into the Deck, then each player draws the same number of cards they shuffled into the Deck.