Mike Olson, Will of the Suburb

Mike Olson, Human Paraquat enters the battlefield tapped. At the start of your upkeep
phase, you can choose to not untap Mike Olson,
Human Paraquat.
At the start of each attack phase, target creature
you control gets +X/+X until end of turn,
where X equals the number of tapped nonland permanents on the battlefield.
"I am constantly tired."