Even conventional draft decks can make use of this Elf creature, such as cards that make Roles, although that may be too slow and sporadic for some players' tastes
How about humans and the long slumbering Katilda, Dawnhart Prime
The prolific price rise, and particularly the recent spike, may well have something to do with the upcoming The Hobbit set, releasing in August (check the MTG release schedule here)
Costing just three mana, it is the one that you hard-cast the most often in fact, you will be hardcasting Endurance most of the time, and only pitching it when its very necessary to do so
If all of their blockers commit to one of your creatures, by my estimation, your other creatures aren't getting blocked
Another thing the Swamp King appreciates is a player casting black spells, which means well want a high volume of black spells in the deck