They have "Sacrifice this token: Add ." Creature - Eldrazi Drone Color tag templates(None) Endrek Sahr, Master Breeder Whenever you cast a creature spell, create X 1/1 black Thrull creature tokens, where X is that spell's mana value
Exile effects rarely target cards that are exiled, it's much more common the target would be in the library, graveyard or on the battlefield
This way, you can return to your initial account if your luck doesn't improve
In addition to this, a big part of the reason these cards were so popular was because the mana in that Standard format was quite bad, to the extent that you were pretty close to wanting Attune with Aether in your decks even before the energy bonus, but once you have the energy bonus you might as well play Harnessed Lightning, which means you may as well play Rogue Refiner to power up your kill spell, and so on
If an artifact enters the battlefield under your control and then Sentinel Sarah Lyons enters the battlefield under your control later in that turn, creatures you control will still get +2/+2 that turn as long as Sentinel Sarah Lyons remains on the battlefield and under your control
3 CMC Opportunity anyone
