Enchant creature
Enchanted creature gets +2/+2.
Threshold — As long as seven or more cards are in your graveyard, all creatures able to block enchanted creature do so.
If a creature the defending player controls can't block the enchanted creature for any reason (such as being tapped), then it doesn't block that creature. If there's a cost associated with having a creature block the enchanted creature, the defending player isn't forced to pay that cost, so it doesn't have to block in that case either.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.