Shyvana, the Half-Dragon

Haste, Double strike
Burnout, {x}: Deal X damage to all creatures
blocking Shyvana, the Half-Dragon where as
X is the amount of mana used to cast this ability.
Dragon's Descent (Shyvana, the Half-Dragon
enters the battlefield with 1 fury counter.
Shyvana, the Half-Dragon gains 1 fury counter
for each creature she damages in combat. At 3
fury counters deal 3 damage to target creature
under your opponent's control.)