Athena, Goddess of Wisdom

When ever a creature with Defender is put on the battlefield under your control or is placed in your graveyard from anywhere, put 1+1 counters for
each on Athena, Goddess of wisdom.
When Power and Toughness reaches 10 Athena, Goddess of Windom gains Indestructible,
Hexproof and {t} Creatures with Defender lose Defender and deal damage according to their Toughness rather than power until end of turn.