Notably, opponents can't remove counters from players or permanents to try to change Lumbering Megasloth's total cost
Plenty of veterans can tell you stories about Nekusar, the Mindrazer being enchanted by Corrupted Conscience, or how a sneaky Tainted Strike ended a game unexpectedly
For instance, the following types are Colorless, Fire, Water, Lightning, Grass, Psychic, Fighting, Metal, Darkness, and Dragon
Meanwhile, Pippin is making life extremely difficult for attackers, blockers, or other effects that want to interact with your creatures, and with vigilance, Pippin can even get in on attacks if you need him toperhaps hes a Ring-bearer
Being able to cheat on mana costs is great, a bit of card draw is nice, and letting all of your other creatures emerge is downright cool
This fits fantastically into the sacrifice and aggressive creature mentality of Rakdos