Flash (You may cast this spell any time you could cast an instant.)
This spell costs
less to cast for each attacking creature you control.
When Embercleave enters the battlefield, attach it to target creature you control.
Equipped creature gets +1/+1 and has
double strike (This creature deals both first-strike and regular combat damage.) and
trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.).
Equip (: Attach to target creature you control. Equip only as a sorcery. This card enters the battlefield unattached and stays on the battlefield if the creature leaves.)