Nikara and Yannik have an internal synergy thats easy to understand, but underwhelming in payoff
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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Red Eyes Black Dragon 1st Edition PSA 10 (2002) There was a constant battle between who liked Blue Eyes and who liked Red Eyes when I was at school, and although I was a BLue Eyes kinda guy, this card never got old
Instant-speed removal gets even better than it already was, especially if your opponent was hoping to use their own pump spell on a blocker