Artificer's Remodelling

As an additional cost to cast Artificer's Remodelling, you may tap 2 Artificers you control.
Sacrifice any number of artifacts you control. Then, search your library for an artifact with converted mana cost equal or less than the number of artifacts sacrificed. If you tapped 2 Artificers, search your library for an artifact with converted mana cost X or less instead, where X is the total converted mana cost of the sacrificed artifacts. Then shuffle your library.