For starters, you can offset the life loss by having a demon in play, a condition you can fulfill with the other room, Ritual Chamber
Scion Summoner, Eldrazi Skyspawner, and Catacomb Sifter all represent reasonable cards that can let our powerful five-drop enter the battlefield ahead of schedule or simply create multiple bodies to pump later on
They include mechanics that would be impossible to include in a standard MTG set
Once you turn this on, 4 mana to clone stuff every turn is hard to beat on a land, and decks that already have token doubling shenanigans, populate, and the like will clearly want this land
This move does 60 hp damage which is low for 4 energy cards but besides doing the 60 damage if the defending Pokemon would be knocked out by this move you get to discard the top 3 cards of your opponent's deck
Attacker Pokmon form the primary offensive strategy of your deck, delivering powerful and game-changing damage