Maybe your router has been there for ages, and it's not working well for your needs anymore
The counters can later be used to negate the opponent's card effects by removing them, shutting down potential options to get the card off the field
Now, 7/7 might feel puny for a colossal entity almost comparable to a major Eldrazi like Emrakul
It's versatile and can be built in many different ways, emphasizing more aggro or defensive styles of play, or even producing a deck that doesnt really need to attack at all if played right
The spread on Manga Rare value is enormous because it depends entirely on the character: a Manga Rare of a beloved arc-defining character (OP-16 Admirals, currently topped by Sakazuki at ~$1,600) reaches four figures while a Manga Rare of a less iconic character settles at $50-80
Even without going infinite, being able to untap every turn with Murkfiend Liege, Drumbellower, White Plume Adventurer or Quest for Renewal generates a ton of advantage in multiplayer Commander