In theory, we could also eventually get it up to 20 counters and build a 20/20 flyer, which can also win the game in a single attack, although this isn't likely in practice
Quandrix decks have the potential to be overly grinding and durdly, packing way too many card draw or ramp spells leading to a swift defeat from an aggressive Lorehold or Silverquill strategy
Spell Pierce also scales better into the late game than all the other one and zero mana soft counters
Fell Beast's Shriek What separated Fell Beast's Shriek from the others is Splice onto instant
In Commander this could close out a game if you're going wide with a Krenko or something, and it can be found with Moggcatcher
High Tide This card is the backbone of mono-blue combo decks, easily one of the best blue cards MTG ever put out there that can massively increase mana output in a single turn