I was looking at this card more as a counterspell versuses removal, where I can turn my Mentor/Delver/Pyro into a equal threat when they go to kill it. With the side ability of removing a Tinker Bot to give you an extra turn or 2, or removing a narset/leo so you can draw cards again.
I thought Beast Within's main selling point is that it can pretty much always create a token. This can only create a token when there is already a creature in play, or there is a planeswalker in play. That seems like a pretty big limitation to me for an oath deck.
Using it on your own cards doesn't seem great either. I mean, I guess if a creature/PWer is going to be killed anyway, you can get a 2 mana 4/4 flier out of the deal. There are certainly better ways to get a value creature into play.
Using it against your opponent also seems underwhelming because leaving a leftover 4/4 flier is not a negligible threat. That can win in combat against many of Vintage's creatures, and is a significant threat to your life total / planeswalkers. There are certainly better removal.
I mean, if you are looking for a card that does all of these things, then sure it is an option, but I think you'd have be pretty tight on deck space to consider this. This is not much more than a niche Singleton.
@brianpk80 I think the normal use case for this card will be on your own creatures. Getting a 4/4 flier for 2 mana is really good, probably at least as good as a 5/5 non-flier for the same. But, having an artifact is easier than having a creature in Vintage, hence the prerequisite is harder.
It's got other modes too, of course. It's a counterspell of sorts too, so you have that extra mode. But if you use that mode you're not beating face. In a pinch, it's removal, but it's removal that probably puts you on a three turn clock, so not great. I like the card in general.
@ten-ten Yeah, but I'd rather play generous gift over angelic ascension when I'm against oath any day. A lot of decks are basically creatureless (oath, doomsday, PO storm) and this can still hit their time vault, necropotence, oath, etc., or turn your own land into a beater as a snap finisher. AA can't do any of that.
As removal, you are more able to defend against a 3/3 bear than a 4/4 flyer.
Using AA on yourself for a 4/4 flyer is basically 2-for-1ing yourself or requires some set up - which means costing 2 is less relevant. If you are trying to mutate a pyromancer token, you are netting 3 power and also likely have 3 mana. Most importantly, you need the pyromancer and a token in play. Making an elephant out of an off-color mox or a land when you've already hit your max curve is better imho. In almost all cases as a "counterspell" to get value out of a doomed PW or creature, I'd pretty much always just rather flusterstorm or something that actually saves said target.