It can protect key pieces with a myriad of protection spells and effects, and ways to shut down spellcasting within your turn some of which, like Grand Abolisher or Conquerors Flail, are even tutorable
I find that cards like this tend to perform better in constructed, where you can have a really sweet manabase, than in cube, where as an aggro deck you have to cobble together a bunch of mismatched duals and pray it all works
Not only are these for the combos but help the deck in general, since it is singleton
Frequently Asked Questions How much is Talons of Falkenrath worth
I think it would be fun but you'd probably find yourself digging for the same wincons again and again
On the other hand, legends in the main set can be designs built around the character independently of other cards to spark new archetypes of decks