cards for tournament

[Punisheris]

hi there guys these are my cards for a tournamnet rules are a lvl 6 monster with an equip to it so plz correct any ocg mistakes i will give rep for any good correction

[spoiler=Lores]

Helldozer, the Pestilence:This card can't be Special Summoned or removed for paly exept by it's own effect. When this card is Summoned destory all lvl 6 or higher monsters your opponet controls. As long as this card remains on the Field your opponet cannot summon lvl or higher monsters. You can remove this card from play to inflict to both players 1000 points of damage.

Sphere of Plague:This card can only be equiped to a "Helldozer, the Pestilence". During each of your Standby Phases pay 800 LP or destroy this card and the equiped monster. Your opponet loses 1 monster zone for each 6 lvl monster destroyed by "Helldozer, the Pestilence" effect. When "Helldozer, the Pestilence" is removed from play double the damage dealt to your opponet. When this card is destroyed the equiped monster is also destroyed.