This effect is quite useful as it just simply allows you to see what your opponent is going to draw and will thus give you some hand information if you're able to keep track of what they've drawn and what they've played, which in turn can be good with cards like Mind Crush
Note that these cards, like the commons, will not be connected like we did in certain Set Boosters
More-or-less the same Feraligatr deck made waves online a few weeks ago when it won a Kyoto City League, but like most people, we thought this was a bit of an anomaly, and assumed the strategy would be a neat but off-meta deck
You can only use this effect of "Battlin' Boxer Chief Second" once per turn
It's not a particularly strong effect, and other cards do what it does but better, but there's a novelty in Guardian Beast
You can only activate 1 "Pot of Duality" per turn