The only issue with this card is that it requires three Lightning Energy to attack, and since they are discarded when used, it is very slow and vulnerable
OphidianOphidian in the command zone is sort of our worst-case scenario here, and once we start doing things like attaching Sword of Truth and JusticeSword of Truth and Justice or playing Malcolm, Alluring ScoundrelMalcolm, Alluring Scoundrel and RadstormRadstorm into Shackle SlingerShackle Slinger, it will quickly become apparent to the table that the Azorius player needs to be dealt with
If you want more clarity, try looking at similar lists on Archidekt as well
Contents: 1 ready-to-play deck of 100 Magic: The Gathering cards (2 Traditional Foil Legendary cards, 98 nonfoil cards) 2-card Collector Booster Sample Pack 8 new-to-Commander cards 10 new Archenemy cards 10 double-sided tokens 1 deck box (can hold 100 sleeved cards) 1 Life Wheel 1 strategy insert 1 reference card
You can find it here
The First Sliver gives every Sliver you cast cascade meaning each one triggers a free extra spell from your library