Delney works particularly well with Esper SentinelEsper Sentinel, all but guaranteeing we'll draw at least one card per turn rotation
Not a bad deal, if you ask me
He is both expensive and relatively low impact at first glance
This is a value engine that helps stabalize the board, close out the game with the pump, and dodges the formats best creature interaction in Fatal Push and Lightning Axe
But to answer the question, and maybe its a bit cheesy, but I think the most surprising reaction Ive seen is just how much players appreciate the little details of the series included, truly validating the effort the various teams put into the set
A deck that dominates today might be obsolete tomorrow, creating a fresh puzzle for players to solve with each new release