These cross-archetype cards increase the sets relevance even for players who do not build around OP-10 leaders
Though the pace of releases for TCGs can be relentless, Lorcana publisher Ravensburger have done a good job of ensuring that new sets arent launched at an overwhelming rate, but still ensure that interest is maintained in the current metagame, while dangling new opportunities with new sets on the horizon
Elspeth focuses on lifegain, creating tokens, pumping creatures, and either destroying or bringing back creatures
That scales up with more and more foes, so it's better in multiplayer than in normal play
At the time, the expansion that this card is from, Steam Siege, was widely hated as one of the worst of the era for countless reasons, despite having some quality cards
You can't go turn five Oath and pray that (a) you've got something in hand to play on the next turn, and (b) that you'll be able to do anything with it anyway