Great Card From Legacy of The Valiant

Here is a very good card to pull out of Legacy of The Valiant, Number 101: Silent Honors Ark Knight.

2 Level 4 monsters
You can detach 2 Xyz Materials from this
card, then target 1 face-up Attack Position
Special Summoned monster your opponent controls;
attach it to this card as an Xyz Material. You can
 only use this effect of "Number 101: Silent Honors Ark Knight"
 once per turn. If this face-up card on the field would be destroyed,
 you can detach 1 Xyz Material from this card instead.

This is good because it allows you to attach your opponents monsters to this card.