The good part is its main abilities: vigilance and first strike
Some of these downloadable tables are set up for 4-player EDH games, but there are others for just about every game type you can imagine, including Draft simulators and Planechase
Rather, you can put stickers anywhere in those cards' names as long as you follow the rules outlined above
However, Runic Armasaur does require your opponents to be running specific cards -- creatures and lands that have activated abilities that aren't mana abilities -- which contributes to its inconsistency
There's been a bunch of oddball releases and some are legal but others aren't and the only way you can tell if by looking up the legality on a site like Scryall (here's a list of every Explorer legal card from the special Arena sets)
Though five strength and three willpower might initially seem like a bad deal, thanks to the cards Champion of Kumandra ability which means Raya, Leader of Heart, doesnt take damage when challenging a damaged character it's actually very good that the stats are weighed so heavily in favour of strength over defence
