Alters by themselves absolutely fantastic and add an extra spark
Three mana to lock a creature down is usually a playable card
If you can combine it with life gain something Black has plenty of in this format in the form of food tokens, it wont even really feel like it has a downside, since youll just keep drawing cards and having enough life to keep on doing it
Every box opened permanently reduces supply
The best card from that collection by far, Hunting Velociraptor honors the most threatening creatures from the original Jurassic Park film by giving all your other Dinos an alternate, far-cheaper casting cost via prowl
Moseo, Veins New Dean A good lifegain deck needs a solid payoff, and Moseo, Vein's New Dean has that with its infusion ability