Blue Wave Dragon, Tetra-drive Dragon

/: 1, and this unit gets +2000 until end of turn. :At the end of the battle your rear-guard attacked, perform the following depending on which battle of this turn that battle was. ・Fourth battle-[Discard two cards from your hand], this unit, and it gets drive -1 until end of turn. ・Seventh battle-[ 1 & discard a card from your hand], and this unit.