Riju, Gerudo Chief

Riju, Gerudo Chief's power is equal to the amount of Wastes your opponents control.
When Riju, Gerudo Chief enters the battlefield, you may put Oasis counters on two target Wastes cards you control. They add mana
of any color to your mana pool.
{t}: Search your library for an artifact card and reveal it. Put it in your hand and shuffle your library.