Enchant permanent
(Target a(n) permanent as you cast this. This card enters the battlefield attached to that permanent.)
When Rune of Might enters the battlefield, draw a card.
As long as enchanted permanent is a creature, it gets +1/+1 and has
trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.).
As long as enchanted permanent is an Equipment, it has "Equipped creature gets +1/+1 and has
trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)."