You might be tempted to swap out Kotis for Muldrotha, and there is merit in doing so, but you can always bring Muldrotha back turn after turn with Kotis, and eventually, Kotis will outscale Muldrotha in terms of power once you cast two creatures from your graveyard, and will only keep growing
Attack 2: [2W] Max Torrent (100+) If your opponent's Active Pokmon already has any damage counters on it, this attack does 100 more damage
Abilities aside, the artwork is truly outstanding, with a shimmering gold holofoil and colorful art by the talented Alice Pisoni
Someone will want this card
Cosmog takes 20 additional damage from Darkness-type attacks
If they remove the creature afterwards, this card will already have gotten its value