Enlarge/Reduce Size:L An elemental summoned by this

An elemental summoned by this spell disappears when it drops to 0 hit points or when the spell ends

or ceiling

you automatically end the effects of a spell on the target if the spell's level is equal to or less than the level of the spell slot you used

The extradimensional space can be reached by climbing to the top of the rope

Enlarge/Reduce Size:L An elemental summoned by thisYou cause a creature or an object you can see within range to grow larger or smaller for the duration. Choose either a creature or an object that is neither worn nor carried. If the target is unwilling, it can make a Constitution saving throw. On a success, the spell has no effect. If the target is a creature, everything it is wearing and carrying changes size with it. Any item dropped by an affected creature returns to normal size at once. Enlarge.