This card should be SR at the least. It isn't designed to have attacking capabilities. It's a kamikaze dragon as its name suggests. It can essentially destroy any monster more powerful than it with no consequential damage. Let's say I summon a Blue Eyes Ultimate Dragon...they can just summon this card from their hand, attack and destroy BEUD due the effect, and take no battle damage. They lose a measly dragon...and I lose a BEUD which is super difficult to summon, and has waaaaay more attack power. Consider an UR trap card "Seven tools of the Bandit" that makes you have to pay 1000 life points only to destroy a trap card. If you think that this is a "rare" card, then you're one of the noobs using the preset overpowered deck cards because you can't make your own deck. This was Konami's attempt to help noobs, and the put a BS overpowered card for it.
you get the card guaranteed just for buying the pack, rarity doesnt have any meaning lol. its like 🔥ing about how windstorm of etaqua should be sr/ur not R.
If a card has abilities that mean it should be UR, then it should be. Getting an UR gem isn't like getting a R gem when you trade a card, so no it's not 🔥ing. It's little 🔥es who like to make stupid comebacks when they know something is overpowered and they can just abuse it themselves.