Octavia, Found by Druids

Your maximum hand size is 8.

While you control/have 8 or more of the following, your creatures gain the corresponding effect;
Cards in Hand- Hexproof
Creatures on Battlefield- Base Power/Toughness 8/8
Lands- Flying
Enchantments- Double Strike
Artifacts-"When this creature deals combat damage to a player, draw a card"
Battles-"When this creature attacks, it fights up to one creature"
Nonpermanents in Graveyard- Prowess