715.3. If the Deal action Splits damage, then the Bonus Damage applies to the amount of Damage that will be Split. This can alter the number of targets eligible to be chosen. Example: Volibear, Furious is a unit that says in part “When I attack, deal 5 damage split among any number of enemy units here.” A player attacks with Volibear, Furious while they also control Annie, Fiery, a unit that says “Your spells and abilities deal 1 Bonus Damage.” Volibear, Furious now deals 6 damage split among any number of enemy units at its location, and can choose to split that damage among up to 6 units rather than the usual 5.