Heroes' Feast Color:Black You remain in the Border

You remain in the Border Ethereal for the duration or until you use your action to dismiss the spell

a contingency cast with water breathing might stipulate that water breathing comes into effect when you are engulfed in water or a similar liquid

the steed gradually fades

you can command any or all of them at the same time

or it can remain and repeat its message whenever the trigger occurs

Heroes' Feast Color:Black You remain in the BorderYou bring forth a great feast, including magnificent food and drink. The feast takes 1 hour to consume and disappears at the end of that time, and the beneficial effects don't set in until this hour is over. Up to twelve other creatures can partake of the feast. A creature that partakes of the feast gains several benefits. The creature is cured of all diseases and poison, becomes immune to poison and being frightened, and makes all Wisdom saving