Being basic doesn't grant any abilities to a land that it didn't already have, and doesn't remove any card types, subtypes, or supertypes
It'd be just okay if the tokens created by Vren were measly 1/1s, but they scale with the number of rats you control
Growlithe (one shiny star-rarity) Arcanine (one shiny star-rarity) Froakie (one shiny star-rarity) Frogadier (one shiny star-rarity) Greninja (one shiny star-rarity) Jynx (one shiny star-rarity) Pidgey (one shiny star-rarity) Pidgeotto (one shiny star-rarity) Pidgeot (one shiny star-rarity) Aerodactyl (one shiny star-rarity) Next, make sure to look out for any two-star rarity full art cards, especially those with rainbow borders
Now that deck has multiple lords that overlap in power level, so having the cheap body that replaces itself is incredibly valuable
Burn is a hyper aggressive deck and even if we remove all their creature threats swiftly, their array of burn spells will eventually out-damage our Mogis