Zublos, Seawater Tyrant

Flash, Trample
Zublos, Seawater Tyrant costs {1} less to cast for
each artifact you control.
When Zublos, Seawater Tyrant enters the battlefield, gain control of all artifacts.
Whenever Zublos, Seawater Tyrant attacks,
defending player may have you gain control
of an artifact of their choice that they control
and tap Zublos.