B/W Horses

Artifact and enchantment spells your opponents cast cost {2} more to cast.

Sacrifice this enchantment: Destroy target artifact or enchantment.

Other Horses you control have indestructible.

At the beginning of each end step, if you gained life this turn, create a 5/5 white Horse creature token.

Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.)

This creature gets +2/+2 as long as you have the city's blessing.

Flying (This creature can't be blocked except by creatures with flying or reach.)

Nightmare's power and toughness are each equal to the number of Swamps you control.

Destroy target creature with power 4 or greater. It can't be regenerated.