Greater Lightning Wurm joined the ever-popular Strafing Dragon to put early points of damage on the opponent until he could end the game with a big unblockable Steel Titan or Brak, Fist of Lashnok
Especially the printings of Solitude, Fury and Grief helped the card going up in playability and usefulness, so as long as those cards stay relevant in the format, Ephemerate will continue to see play
You probably want this card early game, and in Limited you wont have many great targets early game, and you wont be able to reach Spell Mastery by turn two
The Slow Lands [Best Mid-Game Reliability Without Conditions] Primary strength: Mid- to late-game consistency Slow Lands are built for stable mana development after the early turns
Together, they formed a band of outcasts who wander the realms, looting and plundering as they go
At least they'll know Brambleguard Captain appreciates them