Sentry of the Underworld

Target creature gets +2/+2 until end of turn. Scry 1. (Look at the top card of your library. You may put that card on the bottom.)

Flying Whenever this creature attacks, each attacking Human gains flying until end of turn.

Bestow 5WW (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached.) Flying, first strike Enchanted creature gets +4/+4 and has flying and first strike.

Enchant Mountain you control When this Aura enters, exile target creature an opponent controls until this Aura leaves the battlefield. (That creature returns under its owner's control.)

Enchant creature When this Aura enters, draw a card. Enchanted creature gets +0/+2.

Up to two target creatures each get +2/+2 until end of turn.

Flying 1W: Prevent the next 1 combat damage that would be dealt to you this turn.

Destroy target attacking or blocking creature.