This card has generally good stats with 1700 atk and 1600 def, making it a decent card already. but then its effect makes it an awesome card, ill explain below.
When you need to remove an opponents monster but are having a hard time, set this card face down and when they attack it it might be removed from play. they lose an awesome boss monster and you lose a simple level 4 monster, GREAT 1 for 1.
Or you can put it on the field and your opponent may choose to NEVER even attack it.
Or you can summon it and attack a stronger opponents monster to have them both removed from play - awesome 1 for 1.
Combos with other cards:
I like to use this with Tin Goldfish or Kagetokage to get some monsters on the field fast for some XYZ summons.
Ways to counteract it:
destroy this card with a card effect, not through battle
Great 1 for 1
It doesn't fit well into that many theme decks and it removes itself from play so you can only use it once really.
6.8/10 or 7.5/10 when used correctly in a good combo