That will fit a lot of decks, but what happens in the next chapter is that you get two rounds of a pseudo Council's Judgment, and that's a pretty strong effect
Even when we aren't comboing off, Mirrorpool gives us some odd value by copying Manic Scribe (especially in the late game when we have delirium) for additional milling, or sometimes just copying a Compelling Argument is enough to get our opponent out of cards
Its controller may search their library for a basic land card, put it onto the battlefield, then shuffle
(6/18/2021) Cascade triggers when you cast the spell, meaning that it resolves before that spell
Cards like Agents Toolkit can help make sure Blue and your squad end up with Shield counters, which are great at protecting your team from board wipes
The spells you're going to want the most are what are called "removal spells"these are the spells that permanently neutralize your opponent's creatures by either dealing damage, keeping them tapped, or just straight-up destroying them