At best its an extremely situational combat trick in the color that wants combat tricks the least, which doesnt sound very appealing
5 Picks for Modern Sephiroth slides perfectly in decks like Golgari Yawgmoth, Soultrader Combo or Samwise Combo
I like this one in decks like Isshin, or in red decks that want to ramp lands out
Three-chapter summons like this are only good for one attack or two block steps, so most of their value is tied into their abilities
The first effect takes place in full before the other
Unlike the cards in the main set, Through the Ages cards do not become legal in Magic's Standard format (though they still are if the existing card was already legal there, of course), essentially just making them alternate art versions of those cards