Ashling combines a lot of scary rules text together to make a card that looks like it will find a natural home in existing storm shells including red very easily
Grenzo, Dungeon Warden Unfortunately for Grenzo, Dungeon Warden, it has a much better alternate version
Rotation keeps the game fresh, gives new sets room to define the meta, and lowers the entry cost for new players who only need to buy recent sets
Note that there are exceptions
Aside from being a human, which is a very relevant creature type in Commander, Modern and basically every other MTG format, Esper Sentinel is good because it reads: Whenever an opponent casts their first noncreature spell each turn, draw a card unless that player pays X, where X is Esper Sentinels power. Its a bit like Rhystic Study, but the cost can be far higher if youve got things that make humans stronger or you can put +1/+1 counters onto Esper Sentinel
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