Equipped creature gets +1/+0 and has 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.)
When Goblin Morningstar enters the battlefield, roll a d20.
1-9 | Create a 1/1 red Goblin creature token.
10-20 | Create a 1/1 red Goblin creature token, then attach Goblin Morningstar to it.