With vampire lord, sacred phoeinx, and other annoying monsters on the rise ive seen dark core side decked some. While the discard sucks, removing the monster is pretty good, making sure it probably wont come back. No boof of life on it for zombies, no premature/call of the haunted, one less dark/light for chaos. I wouldnt maind eck it, but it might be a card to toy with for the side deck.

its a strong card, but BTH, ddwl, and book of life have same effect with less cost, depending on how u play or how deck is built.

bth is never a guarantee though, if they ram a turtle and summon vlord u cant use it, if jinzos out its useless, or they can simply destroy it before u can use it. ddwl is good and all but its only one card, and without luck you probably wont have her out when you need her. book of life does nothing to remove something on the field so it really cant be used in comparison. Im not saying its a great card, but maybe for people on a budget or just looking to try new stuff its a card to consider.

To help with the discard you could use

Roc from the Valley of Haze
Outstanding Dog Marron
Sinister Serpent