Cestus summoning condition allows you to put a GB monster onto the field without using up your normal summon, and this fixes a problem - exacerbated by Master Rule 4 the archetype inherently suffers from, which is, getting that crucial second GB monster onto the field to make a strong first turn play
They will perhaps take a look at this card and be incredibly confused since all the card seems to do is just give your opponent Life Points which is counter-intuitive to the objective of the game
negate the Summon or activation, and if you do, destroy that card. Let us begin with Thunder King Rai-Oh
While not as prevalent as Ash Blossom, many players use Ghost Mourner as an alternative to interrupt opponents' combos
Though not all Magicians can really do it, I think it is Destruction Magician that has a Scale 3 iirc, and the effect might end up screwing you over if you needed X Magician Pendulum to be drawn and used as your Scale, only to end up Summoning it with this card