MAHA. Happy hunting!
ARTHprotocol uses chainlink and umbrella finance oracles for the various collaterals.
ARTHusing the affected collateral to get liquidated.
ARTH's collateral exposure is diversified so that there is no heavy risk from a single type of collateral.
ARTHis only minted/burnt on the Ethereum blockchain. Deployment on various other sidechains (or layer 2 chains) exist as simply bridged tokens that were originally issued on the Ethereum chain.