I had two Demonic Pacts on the battlefield, the first one had been on the battle field for three turns, the second I had just cast the previous turn. I did not want to lose the game on my next turn, so I cast Beseech the Mirror using the Bargain ability. I was looking to sacrifice the second Demonic Pact so I could search for and cast Harmless offering. Arena did not give me the option to sacrifice the second Demonic Pact (it was underneath the first one), it only let me select the first Demonic pact. I was hoping to pass the first one to my opponent so they would lose, but instead I had to sacrifice the first one and wait a couple of turns before I was able to find another harmless offering.