For the cost of 2000 LP, you can negate the special summon of a monster and destroy it
The texture was a big indicator and there was no way to show that in a picture I posted this video on YouTube
The decision to make a new designation 'banned as Companion' appeared to weigh heavily on the designers, based on Gavin Verhey's article - adding sub-lists increases complexity and the chance that players will bring a card in a slot it's not supposed to
Berserker Servant - C Alter Cannot be Normal Summoned or Set
It can't be Normal or Special Summoned while you control a Monster (although it can still be Normal Set, allowing you to Flip Summon it later), which in and of itself is an unusual effect but a pretty simple and easy one to get
Im also much more excited about the second-best card in the deck, since Sorin, Imperious Bloodlord is yet another comically powerful 2019 planeswalker