White is the color of small increases in power/toughness like Glorious Charge. If you want this to be more of a finisher, I suggest incorporating flying (a white mechanic) over pure unblockable and reduce the cost anyway.
The idea is to make white mass pump spells distinct from green mass pump spells like Overrun.
White is supposed not to get +3/+3 from a single spell. This grants +5/+5 with a single spell way beyond what white gets to put on the offensive.
edit: changed to bounce because hand clutter for them, and they dont get the exile / flicker effects that will be put in this set
should it cost

? This seems okay, as you might not have the land, but you tell me
also Flying sort of fits flavorwise, but im not desperate enough to use it yet
well it needs to be more powerful if the pump will be lowered.
White is the color of small increases in power/toughness like Glorious Charge. If you want this to be more of a finisher, I suggest incorporating flying (a white mechanic) over pure unblockable and reduce the cost anyway.
The idea is to make white mass pump spells distinct from green mass pump spells like Overrun.
White is supposed not to get +3/+3 from a single spell. This grants +5/+5 with a single spell way beyond what white gets to put on the offensive.