Jed MacKay 
Magic #9 [PDF ebook] 

Kaya, Vraska, Ral, and Jace assemble the most powerful Planeswalkers from across the multiverse as war breaks out. But the terrible and ancient enemy they face is a force too powerful to face head on With [REDACTED] headed their way, the only way to save the multiverse is to make a dangerous alliance with death! Will their veritable array of powers hold off the teeming dead and lead the true threat into their trap?