This story is a sequel to My Iron Warriors: Ordinance is Magic

In the aftermath of the Chaos Space Marine assault, and the opening of a Warp Rift in the ruins of Canterlot, Ponykind struggles to survive with the loss of all its Princesses. Drawing its allies close, and trying to fight back against the slowly rising Daemonic tide infecting the world, the remnants of the once-proud kingdom cannot forsee the events beginning to bear down upon them. The Ruinous Powers of Chaos are not yet done with this world...and neither is the Imperium.

Meanwhile, on the other side of a certain dimensional portal in the Crystal Empire, life at Canterlot High goes on much as normal. But, unbeknownst to the student body, a new threat is rising on the other side of town - a threat utterly focused upon triumphing over its self-proclaimed rival.

The only problem is...they're not as good as they think they are...

(If you haven't read the first one, this won't make much sense....for obvious reasons.)

Their ship crippled by a surprise attack from the Thousand Sons, the Chaos Space Marines of the Iron Warriors thirteenth company are forced to escape into a warp rift. Finally crash landing on what they believe to be a Daemon World in the Eye of Terror, populated by small Horse-like xenoforms, can the most bitter and paranoid of all the Space Marine Legions truly learn the Magic of friendship? And can they go more than a week without trying to blow something up?