I used A Blast Held by a Tribute against Ishizu when she summoned this card, and it didn't even work. This card is almost indestructible. It's very unlikely you're going to beat level 40 Ishizu if she summons this.
Read the effect kid. if this guy would be destroyed you can discard 1 "gravekeeper" monster instead so she discard her gravekeeper to protect this card.
Champion's Vigilance is the solution for this monster I tried it and I could destroy this scaring monster easily ... Its attack was 4500 so I was very happy when I could destroy it ... You negate the summon Then Be sure it will be destroyed