MewTwo has psychic abilities and can literally repel any attack
One of the tricky things about death triggers is it can be hard to trigger them
Being 2 mana means you can get her out early and start to work up the mana value chain to get bigger cards out
Noctis, Prince Of Lucis We Did It, We Broke Aetherflux Reservoir Despite introducing tons of artifacts, an Equipment in particular, Final Fantasy didn't make much of a dent on artifact decks
I doubt that this was even that good when first printed, but a 7-mana 4/4 that you then need to pay to give flying (and the power boost is balanced by the toughness loss) just doesnt cut it in any format these days
Decision is a fun card to bargain with in certain matchups, but it always serves you well against other control lists as long as you target the right spells and dont let yourself get your own spells countered by your opponents votes