Other Dwarves you control get +1/+0.
Whenever a Dwarf you control becomes tapped, create a Treasure token.
Sacrifice five Treasures: Search your library for an artifact or Dragon card, put that card onto the battlefield, then shuffle.
For the triggered ability to trigger, a Dwarf you control has to actually change from untapped to tapped. If an effect attempts to tap a Dwarf you control while it is already tapped, the ability won’t trigger.
Magda’s triggered ability doesn’t allow you to tap any Dwarves. You have to find some other way to tap them. Attacking is still a great way to go.