More than that, the retreat cost on Butterfree is extremely low, requiring only a single Colorless
Every single turn, you can destroy all special summoned effect monsters on the field with an attack lower than Scarlight Red Dragon Archfiends, then burn your opponent 500 damage for every card destroyed
Then creatures you control gain trample and get +X/+X until end of turn, where X is the amount of life you gained this turn
Sefris of the Hidden Ways Sefris of the Hidden Ways at first glance doesnt seem like a very good commander
Rather than trap card negation being an important strategy in modern Yu-Gi-Oh!, its now more important than ever to do whatever is possible to stop your opponent from playing their spell cards as much as possible
You need true reloads, and Experimental Frenzy is the way to go