Citadel Sentinel

Enchant Land
Moonlight - Whenever a creature attacks you or a planeswalker you control, if enchanted land is untapped, creatures you control gain +0/+3 until end of turn.
Eclipse - Exile Citadel Sentinel. Create a 5/5 white and black Dragon creature token with Flying and Flurry. (Whenever this creature deals combat damage, untap it. It deals damage equal to its power to target creature.)