Many of the reprints in Double Masters have caused cards to halve in price due to their wider availability
If youre playing an elf Commander deck, chances are your commander makes a lot of elves for your lords to buff, or theyre the payoff for having a bunch of elves around
They can still cast spells, so if they have a way to remove Overwhelming Splendor with a card like Krosan Grip they still can, but if it's tied to a creature, your opponents can be stuck under the Curse for the rest of the game
Besides the very narrow niche use, you really don't even fight Mediators/Orators, with them showing up in only two story battles, rarely showing up in random encounters, and you don't see enemies using Talk Skill as a secondary skillset either
So, where does Dralnus real card advantage come from
Obeka is the best effect on this list because it can be used time and time again, although only effectively on your own turn