Not sure what the cost is supposed to be but this forum post says Nature’s Bounty is supposed to cost 11 but in game it’s 15 so just reporting this incase the 15 is an error.
Also the posted stats say:
Deck Limits: 08 Creatures, 06 Spells, 05 Supports
But post update she currently has:
Deck Limits: 10 Creatures, 04 Spells, 05 Supports