Accel Assassin

[Thomas★Zero]

[spoiler=Effect]While you control another face-up monster: this card cannot be targeted for an attack.This card can attack your opponent directly, but when it uses this effect, any Battle Damage it inflicts to your opponent is halved. This cards number of attacks during the Battle-Phase is equal to the number of monsters your opponent controls. You can only control 1 face-up "Accel Assassin".

 

[Flash Flyer - Sakura]

This card should discourage mass summoning (unless they want this card to hit for 4K damage at maximum, barring any Equips and other stat adjustments), although given the gamestate at present, the opponent shouldn't have much of an issue to remove it (either on its own or with another monster up). Of course, the converse is true and if your opponent doesn't have monsters to begin with, this card can't even attack.

 

Trying to remember if there are any Equip Cards or something that'll trigger every time this card deals damage; if there are, then stuff could get out of hand. Don't think there are too many; at least after checking the database for stuff.