Epidemius, Tallyman of Nurgle

You gain a number of tally points equal to the current battle round number. During the battle round, you can spend your tally points. For each tally point you spend, you can re-roll 1 hit roll, 1 wound roll, 1 save roll or 1 ward roll for a friendly Maggotkin of Nurgle unit wholly within 12" of this unit. At the end of the battle round, any unspent tally points are lost.