"Roar of The Thunder King" and "Archfiend of Chronomancy"

[afunworm]

Enjoy. Any comment is highly appreciated.

Personally, "Roar of The Thunder King" maybe a little bit overpower, but since "Thunder King Rai-Oh" is limited to 1, this shouldn't be the problem :P.

I made "Archfiend of Chronomancy" to support Dark World, but I tried to give it heavy cost so that it can't always be abused.
 

Lore:

3 Level 8 Monsters
Once per turn, during your opponent's turn, if they Summon a Monster: You can detach 3 Xyz Material from this card; equip that Monster to this card. Card effects cannot be activated in response to this effect. During your Standby Phase: You can send 1 Monster equipped to this card to the Graveyard; inflict damage to your opponent equal to that Monster's ATK.

Lore:

1 Tuner + "Thunder King Rai-Oh"

When a Monster is Summoned to your opponent's side of the field: You can banish 1 "Thunder King Rai-Oh" in your Graveyard; negate the Summon and banish that card. When this card leaves the field: Special Summon 1 banished "Thunder King Rai-Oh" to your side of the field.