Glumhag

When Glumhag deals damage to player, player
must pay {b}{2}. If not, create artifact token with Indestructible and "{t}: Target creature ability,
spell or instant costs an additional {1}. Only untap
This artifact whenever another artifact enters the
battlefield under your control."
When Glumhag dies, exile five artifacts you
control. If you exile 5, flip card with three
Counters. At upkeep, remove 1 counter. If no Counters can be removed, flip Glumhag tapped.