Red-Eyes Black Dragon

Flying, vigilance, trample

Tribute Summon 7 (You may sacrifice any number
of creatures with total mana value equal to 7 or
greater rather than pay this spell's mana cost.)

Whenever Red-Eyes Black Dragon becomes tapped
(defense position), its gets -0/-1 .(7/6)

ATK 2400 = 7
DEF 2000 = 6