Obelisk, le Tourmenteur CT13-FR002

Requires 3 Tributes for its Normal Summon (cannot be Set Normally). The Normal Summon of this card cannot be negated. When it is Normal Summoned, card effects cannot be activated. Once per turn, during the End Phase, if this card was Special Summoned, send it to the GY. You can Tribute 2 monsters; destroy all monsters your opponent controls. This card cannot declare an attack the turn this effect is activated.