Kjar, Renegade Artificer

When Kjar, Renegade Artificer enters the battlefield, create two 1/1 colorless Servo artifact creature tokens.

Whenever an artifact creature you control dies, reveal the top three cards of your library. Put each artifact card revealed this way into your hand and
the rest into your graveyard.
{1}{b}{u/r}, Sacrifice two artifacts: Put a permanent
card from your graveyard onto the battlefield.