This is meant to ensure there is a level of variation and randomness to the design that fits Un-sets chaotic themes, while also preventing them from becoming too dominant in Eternal formats
You can up the value by putting it into a deck that likes sacrifice, such as Thraximundar
Not only are you limited to one copy of a specific Radiant Pokmon (e.g., one Radiant Greninja), but you can only include one Radiant Pokmon of any kind in your entire deck
Emet-Selch is a transforming card, meaning he has two sets of abilities that can be used, though once he's been transformed he can't go back
Those who ignore these warnings inevitably issue final transmissions that are too glitched and garbled to make out
Sure, they both play green and can remove an enchantment easy enough