That sentence might be obvious to you, but think about the practical applications a moment
But heres the graphic that explains the mechanic, which will work well for our purposes here: So the first time a Nazgl enters the battlefield, the Ring tempts you, and it will put a +1/+1 counter on itself and any other Wraiths floating around your side of the battlefield
Most soul sisters decks have switched to being Martyr of Sands decks, but for a few years, they were true soul sisters decks, relying on cards like Soul Warden and Soul's Attendant
One example is [c]Terefi, Temporal Archmage[/c]
Nazgul #0728 : Around $17 for normal and foil at $18 Nazgul #0727 : Around $16 for normal and foil at around $20 Nazgul #0725 : Around $13 for normal and foil at around $20 Nazgul #0730 : Around $14 for normal and foil at around $19 Nazgul #0724 : Around $14 for normal and foil at around $19 Nazgul #0729 : Around $13 for normal and foil at around $19 Nazgul #0726 : Around $11 for normal and foil at around $16 Nazgul #0723 : Around $10 for normal and foil at around $19 Nazgul #0551 : Around $5 for normal and foil at around $19 Best foil Realms and Relics LTR box toppers Multiple Magic cards from the LTR set have either extended art or borderless surge foil variants that are worth money, priced much higher than other variants of that card
Theres a ton of overlap in ways to make all of the aspects of historic apply in Cube, and K-9, Mark I stands out to me as being very useful specifically in this space