Santa Clause

When Santa Clause enters the battlefield, create 10 tapped 1/1 red and green Elf Worker creature tokens
Tap X untapped Elf Workers you control, search your library for an artifact with converted mana cost X or less and put it onto the battlefield under target opponent's control
Whenever 10 or more Elf Workers you control become tapped, create two more tapped 1/1 red and green Elf Worker creature tokens