Swiftfoot Boots The equip cost on Swiftfoot Boots keeps it from ranking better, but the hexproof often makes it my preference in most decks
II: Whenever an Assassin you control attacks this turn, put a +1/+1 counter on it
The overall setting for Warhammer 40,000 includes many of the more typical tropes of fantasy like humans, elves, and orcs fighting each other, big and epic battles, plus aliens and space technology
Add in the fact that the card is actually a good legendary Blood Artist that provides card draw and a strong finisher in Sephiroth, One-Winged Angel, and I have to say that this is a 10/10 design and a great commander
I am also excited by Estrids Invocation, the Copy Enchantment variant this deck really wantsresetting to the most valuable enchantment for the turn, copying a Mask token for Estrid in a pinch, or just gaining us some extra advantage by flickering back in as a cantrip like Flight of Fancy