Eidolon of Nike

Bestow {1}{r}{r} (This card is an aura until removed.)
Enchanted creature gets +1/+1.
When Eidolon of Nike is cast or detached, enchanted creature or Eidolon gains one of:
- Double Strike
- Bushido 2 (+2/+2 for each block or blocker)
- Heroic (+1/+1 counter when you cast a spell on it)
- Tenacity 2 (+2/+2 until end of turn if targeted by enemy spell or ability)
If Eidolon of Nike detaches, pay {2}{r}{r} or return it to your hand.