Axe of the Eternal Hunt

Equipped creature gets +1/+0 and has trample.
Whenever equipped creature is blocked by a creature(s), it gets +1/+1 until end of turn. Whenever equipped creature attacks a planeswalker, it gets +2/+2 until end of turn. Whenever equipped creature kills a creature or planeswalker, untap that creature and after that phase there is an additional phase of combat, but only the equipped creature may attack.
Equip {3}