This means, besides synergy with card draw, Chivalric Alliance also gives you creature tokens, and thus fills your board
The Nightmare mechanic is an enters effect that removes one or more permanents or cards from a zone, usually the battlefield, and returns them when that creature dies
If you fail to draw your early-game ramp cards, you tend to suffer a pretty slow defeat
It reads, Whenever Lord of the Void deals combat damage to a player, exile the top seven cards of that players library, then put a creature card from among them onto the battlefield under your control. While mill isnt likely to be your main strategy in a deck filled with Demons, the exiling is definitely nice
Most extra-turn spells cost five mana or more, which explains why its such a massive outlier in power
At the moment, the exact drop rate of these cards is unclear, and its unknown if any of them are rarer than others