Omnis, Cosmic Avatar

Warlord 5 —This creature can only be cast as
your commander. It's commander tax is {5}.
Indestructible
All other creatures get +2/+2.
At the beginning of each players draw step, that
player draws an additional card.
{w}{w}{u}{u}{b}{b}{r}{r}{g}{g}, {t}: Exile all nonland permanents, and all nonbasic lands. Each player discards their hand and draws seven cards.
Activate this ability only during your turn.