Jill, Shivas Dominant / Shiva, Warden of Ice With Jill, Shiva's Dominant, you get a versatile tool that bounces a nonland permanent on entry, disrupting almost any strategy
It has some of the highest attack power of any card in the Obsidian Flames set, with the 200-damage move Phantom Queen
What competitive formats is Sword of Vengeance played in
The mono-white version of Cloud focuses on Equipment, triggering his own and his Equipments' abilities an extra time, allowing you to double-up on benefits and build Cloud into an unstoppable behemoth
Diffusion Sliver
There are graveyard decks that mill their own library, but these are rarely described as "mill decks." There is also some disagreement about whether decks that mill their opponents for value, like UB Rogues, count as "true" mill decks