Daleks want to kill every non-Dalek thing in the universe, and they say Exterminate! any time they use their lethal weapon
The electric spark shapes around the cheeks give kids a fun detail to color in bright yellow or white
It all just has to do with demand
The deck starts with every damage multiplier you can get your hands on, then comes the burn
Especially when combined with more of Rise of the Floodborns best amethyst cards, which provide lore and other benefits when removed from play - using Arthur, Wizard's Apprentice as a cheap way of bouncing them between your hand and the table, activating effects as you go, is sure to sit at the heart of many purple decks
For Onix 56/102, he captured the grandeur of the Pokmon as it emerges from a rocky landscape, emphasizing its strength and earthy nature