The idea is that I use Dragon Throne to pump my team, I attack, and before damage I use High Market or a removal spell to get rid of my combat damage replacement effect
We got most of the cards from The Dark for sale there, so no need to look somewhere else
Consider playing Palantir of Orthanc in a Thassas Oracle self-mill deck, for instance
The first ability costs three mana and turns a permanent into an Artifact, which is fun, but often not great on its own
A 3/2 flash lifelink creature would already be playable in a control deck looking to stabilize, but this one comes with Swords to Plowshares attached
Its a complicated mechanic for sure, and one of the most individually complex mechanics overall, but not the worst mechanic if you ask me, and at the same time it's easy to grasp since it heavily draws from LotR lore