Winged Dragon of Ra

You must pay the mana cost to cast this card. As an additional cost Sacrifice 3 creatures.
This card cannot be countered. When this card enters the battlefield, other cards and effects cannot be activated.
When this card enters the battlefield: You may pay Life so that you only have 1 left; this card's Power and toughness is equal to the amount of Life paid.
You may pay 5 LP, then target 1 creature on the field; destroy that target.