Guihave's Sword of Decay

When Guihave's Sword of decay is equipped to a creature, that creature can't attack until the next turn,
unless it is a Guihave creature.
Equipped creature gets +X/+X where X is the
number of Planeswalkers, Creatures, and Artifacts
in all graveyards and
"Whenever this creature deals damage to a player,
put that many poison counters on that player.
•Equip {10}
A blade forged by a forgotten smith, for a scourge no one would forget.