My initial impression is that it wouldn't be worth it for Scourge Wolf alone, but if there are other cards that can benefit from the graveyard filling plan, it might be quite good
Id consider this if I just wanted more mana fixing in a 3+ color typal deck, maybe in something like 5-color slivers or dragons, but most 2-cost mana rocks you plug in will be better
Play 23 to be 95% safe
Phenax Is Instant-Speed Pressure: Since Phenax grants the ability at instant speed, you can mill during opponents' end steps, dodge removal, and always threaten the win
Other old sets from the 1990s had larger print runs, and the later in the decade you go, sealed product trends toward becoming easier to find (though Alpha is hardly the only difficult set to find sealed product for, as Beta s print run was only about 3x the size of Alpha s)
The counterspells available in Modern are generally limited in scope in one way or another, but one recent printing thats very underrated in Swan Song