Link, Hero of Hyrule

When Link, Hero of Hyrule enters the battlefield
and at the beginning of your upkeep,
venture into the dungeon.
Equip cost of equipment you control costs X less
for each time you have completed a differently
named dungeon.
Whenever a legendary boss creature that was dealt
damage by Link, Hero of Hyrule dies this turn, put
a +0/+1 counter on Link, Hero of Hyrule.