mtg all cards are artifacts Elite Artifact Deck - Modern Legal - Custom Built - Magic The Gathering - *From the Revised Edition 3rd Ed Magic: The Gathering - Most

This makes it a centerpiece for the top blue card decks that prioritize inevitability over attacking

Hero's Blade gives a creature +3/+2, and anytime a legendary creature arrives, the Blade may be equipped to it for free, and there are more than a few legendary Cats that may appear in this deck, aside from Arahbo itself

The triggered ability is very weak, essentially all you do is get tempted by the ring and get a +1/+1 counter, very rarely will you even draw a card

It doesnt save my permanent from being destroyed in other ways, such as through combat damage

A bit of an easy take on your theme, but why don't you play some Shapeshifters as a way to have more Surrakar