Many duelists, but especially Standard ones, will continue to summon monsters in Attack position, and leave them in it, for turns on end, even if you have monsters capable of beating theirs in play and they have no means of defense, like trying to bait you into triggering a Trap
Now, you can shred your opponents hand multiple times on turn one, either by evoking Grief and casting a discard spell or by pairing it with cards like Ephemerate or Malakir Rebirth
Of note, youre still casting the spells you copied, so yes, this card does work with Guttersnipe the way you want it to, which is also in this set
+1/+1 counters
14 Unless they genuinely address the supply issues these are just empty words IMO