Scion of the Ur-Dragon [Commander 2017] Kithkin you may transform Dowsing Dagger

you may transform Dowsing Dagger

Siamese twins

tap all lands that player controls that could produce any type of mana that land could produce

Hidetsugu held over a dozen oni in blood oath

Then look at the exiled cards and put them on top of your library in any order

Scion of the Ur-Dragon [Commander 2017] Kithkin you may transform Dowsing DaggerSet: Commander 2017 Type: Legendary Creature Dragon Avatar Rarity: Rare Cost: {W}{U}{B}{R}{G} Flying {2}: Search your library for a Dragon permanent card and put it into your graveyard. If you do, Scion of the Ur Dragon becomes a copy of that card until end of turn. Then shuffle. "I am the blood of the ur dragon, coursing through all dragonkind."