So, if you move or remove the last counter, the planeswalker is effectively destroyed, even though its not technically destroyed by a spellit just dies because it has no loyalty left
With the loss of power from the cube she has become worse both not being able to recur absurdly powerful cheap cards like Time Walk, Ancestral Recall or Black Lotus and also the lack of prominence from combo decks where she also frequently features
Did you hit an eight-mana threshold
702.170e: If an effect refers to plotting a card, it means performing the special action associated with a plot ability
Anyway, one-mana red creatures are good
Svyelun of Sea and Sky Ward 1 is more of an annoyance than a real protective ability, but Svyelun of Sea and Sky has built-in resilience, so your opponent cant brush it aside