Deceit Deceit has a beautiful design
(A copy of a permanent spell becomes a token.) Triggered abilities use the word "when," "whenever," or "at." They're often written as "[Trigger condition], [effect]." Some keyword abilities are triggered abilities and will have "when," "whenever," or "at the beginning of" in their reminder text
Playing an early demon leads to the game swinging heavily in your favor, as it will immediately make your opponent discard a card on your end step and threaten to do so again turn-after-turn, while also killing of their creatures
If you can bounce it back to your hand you can keep the board clear turn after turn
As an Eldrazi, there are powerful ways to ramp out Spawn-Gang Commander in Modern, with Eldrazi Temple and a card later in this list as potential favorite options