Lord of the Glittering Hall

You don't lose mana produced by artifacts as
steps and phases end.
Other Dwarves have Mountainwalk and "If this creature attacks and isn't blocked, you may gain control of target artifact you don't control until
end of turn and untap it."
{t}, Sacrifice a nontoken artifact: Put a +2/+0 or
+0/+2 counter on target creature.