Quantum Riddler and Glarb Interaction

This is mostly due to Arena handling the casting of quantum riddler and not allowing the warp cost to be paid in this condition, unsure if it's a bug.

[[Glarb, Calamity's Augur]] enables me to play lands and cards from the top of my library

On arena and irl, the overlords, e.g. [[Overlord of the Balemurk]] can be cast from the top of the library as the base spell is >4 cmc for the reduced impending cost.

Does warp follow the same conditions, i.e. Am I allowed to warp [[Quantum riddler]] from the top of the library as well in paper for 1U and not pay the 3UU cost?