Doom Bio-Chariot [TheMan singles]

[TheMan]

[IMG]http://i56.tinypic.com/vwrd5u.png[/IMG]
Lore: This card cannot be Special Summoned. This card cannot be destroyed by battle. You take no Battle Damage from battles involving this card. When this card is attacked while in face-up Attack Position, during the End Phase of that turn, gain control of the monster that attacked it. During each of your Standby Phase, you take 800 damage to your Life Points. When this card is destroyed, destroy all monsters you control.

Credits:JazinKay

Well, 2 questions. OPd? And, how to use this card for perfect results?
That shouldn't be so hard .
And ofc, OCG fixes are very welcome .