I'm not sure that I see how that would compel the opponent to attack your creatures, though it goes well with angels, for sure.
This card does scare me, particularly when I think of a few certain combos.
This in a voodoo deck could be scary, since the voodoo doll can take several hits, which would be reflected right away, and an additional 2 damage per lion per attack.
Mostly, it would be used to prevent mass CC, though, since a few of these and a lot of other creatures on the field would cause a lot of damage if the opponent tried something like fire storm.
I would worry a bit about certain shields that are already rarely used. Turtle shield comes to mind right away.
