Outside of that weakness, this deck seems quite robust and powerful, and I imagine something similar will shortly become a pillar of Standard, though it's unclear exactly what will be presented to supplement Gideon, Nissa and their Oaths.
As does the way those elements synergize with the overall card
In most cases, shadow is effectively unblockable
You can't change the "a" in "roll a six-sided die," but you could change the "two" in "roll two six-sided dice." You can change the number of sides on a die
Until the Commander Panel revisits the list in May or June, Iona is likely to continue her slow slide back toward her original $5 floor
Has Reach and the new Revolt mechanic, which lets you draw a card when Silkweaver Elite enters the battlefield if a permanent you controlled left the battlefield this turn