bllr booster box Critical Blow and the elemental calamity beasts and the Great Battle Partners Booster Box |

These include the much talked about Black Lotus (the most valuable card) plus Ancestral Recall, Time Walk, Timetwister, and the five Mox cards (Mox Pearl, Mox Sapphire, Mox Jet, Mox Ruby, and Mox Emerald)

If you cant discard 4 cards, this attack does nothing

This ability works very nicely with Behold, too

Fans also have no way of knowing, as of now, whether Takumi Akabane knew if any of the cards were fake when he sold them

Though it's certainly possible to negate this effect, it's hard to argue that the ability to bring a monster back from death isn't useful

The equipped monster gains 400 ATK/DEF, it cannot be destroyed by Spell or monster effects, also your opponent cannot target it with monster effects or Spell Cards or effects