Doomsday card Start to a set?

[Ghoulish]

Im thinkin of Making a doomsday dark fiend deck which basically will surround the interchange of level 4 and possibly lower monsters with level 4 monsters on the field as to prevent the monster on the field from beign removed from play. plz rate and tell me what u think as usual plz dnt write "awful" or "OCG errors" plz specify the errors and where i can improve thx.

 

 

All "Doomsday" monster cards on your side of the field gain 300 ATK and DEF. During each of your Standby Phases add a Doomsday Counter to this card, for each Doomsday Counter on this card Decrease this cards ATK and DEF by 300 points, when this cards ATK or DEF reaches 0 destroy this card and Remove it From Play. During your End Phase you can send this card to the graveyard to Special Summon 1 level 4 "Doomsday" monster from your graveyard.