If you roll a 3 but there aren't any cards with mana value 2 or less in your graveyard, you'll just remove one loyalty counter from Comet
She has joined forces with fellow Planeswalkers on a direct assault on New Phyrexia to take care of the Phyrexian problem before it spreads to even more Planes.
Each turn, you may activate one loyalty ability of a planeswalker you control, and only at sorcery speed
Its also handy in a spot-removal heavy meta since you can replace your creatures
Additionally, the deck features a sub-theme where it generates massive numbers of 0/1 eldrazi tokens which can be pumped by It that Heralds the End and Titans' Vanguard to overwhelm through a crowded board state, or deal direct damage through Spawn-Gang Commander's ability
A hasty 4/4 flying dragon provides another layer of pressure while you accumulate resources, beating down in the air and keeping planeswalkers well below their ultimate