Algymir, Manifested

Trample, vigilance, ward {8}
When Algymir enters the battlefield, if you cast
it and you control four or more other Giants,
add {w}{u}{b}{r}{g} and you become the monarch.
Whenever Algymir attacks, draw two cards if
you are the monarch. Otherwise, create a 4/4
legendary Giant creature token named Giant
King's Scion that is all colors and is tapped
and attacking.