The Master Sword

Equip {6} and lose 3 life.
Equip legendary {3} and lose 1 life.
Equipped creature has [+1/+1] and "Whenever
this attacks, as long as this hasn't taken damage this
turn, deal [1] damage to target creature."
{w}{w}{w}{w}{w}: Change the numbers in the
brackets to 4, 2 and 3.
{2}{u}{u}{u}{u}{u}: Change the numbers in the
brackets to 7, 3 and 5, activate this ability only
if you have spent at least 5 mana on activated
abilities of this card.