Urist McAledwarf, Brewmaster

You may choose not to untap Urist McAledwarf, Brewmaster during your untap step.
{2}{r/w}, {t}: Dwarf creatures you control get +2/+2 as long as Urist McAledwarf, Brewmaster remains tapped.
Inspired -- Whenever Urist McAledwarf, Brewmaster becomes untapped, put a colorless legendary artifact token named Master Brew onto the battlefield. It has "Sacrifice this artifact: target creature you control gets +4/+4 until end of turn."