Add in some backup tutors and you have a combo deck
Not only is it one of the four potential promotional cards that you can find inside a Perfect Order: Build and Battle Box, but it also has an illustration rare variant, setting it apart from the Perfect Order printings of both Honedge and Aegislash that simply have regular artwork
Lands specifically being so simple is a big reduction in mental load, and while there are technically differences between the back (Plain ETB tapped vs ETB tapped unless you pay 3 life), it's not enough that I would (for eg) only run one of those kinds if the front faces both felt right
These are mass-produced reprints, printed in large quantities to meet demand from players and gift buyers
There are probably a billion and a half combos with Xavier utilizing Intruder Alarm as well, and it looks good with cards like The Sixth Doctor that allow you to make copies of legendary permanents
Corrupted then checks to see if an opponent has three poison counters, giving extra benefits if they do
