I am looking for clarification as to the mechanics of the Blink spell. I believe that the spell reads quite clearly, however most of my play group does not agree with my recent ruling.
The campaign is run using the D&D 5e ruleset. During a recent session one character managed to disguise himself, pass over a dozen stealth and persuasion checks to bypass seven cultist camps, and found himself at the top of a fair sized hill addressing the leader of the forces arrayed on the hill. He is found out once he arrives at the pinnacle, is soundly cudgeled and, having used Misty Escape to teleport 60' and turn invisible, casts Blink.
From the Blink spell description(PHB, p. 219)
Roll a d20 at the end of each of your turns for the duration of the spell. On a roll of 11 or higher, you vanish from your current plane of existence and appear in the Ethereal Plane (the spell fails and the casting is wasted if you were already on that plane). At the start of your next turn, and when the spell ends if you are on the Ethereal Plane, you return to an unoccupied space of your choice that you can see within 10 feet of the space you vanished from. If no unoccupied space is available within that range, you appear in the nearest unoccupied space ...
The spell, to me, seems quite clear. A character, on the turn they cast Blink:
- Finishes their turn, including movement, bonus actions, and any other action allowed under the normal turn structure by their class, abilities, and items.
- Once their turn is declared to have ended, the player rolls a d20. On a roll of 11 or greater, they jaunt to the Ethereal. If they do not jaunt, they remain on the Prime Material.
- Play proceeds, with other players, NPCs, and mobs taking their turns in order of initiative.
- The player who cast Blink begins their next turn, appearing within 10' of where they left the Prime Material.
- The player takes their turn, including actions, movement, bonus actions, and any other action allowed, per Step #1.
- The player ends their turn and this cycle repeats until the spell ends, willfully or otherwise.
Most of my players do not believe that the spell would allow a character, should they roll 11 or higher at the end of their turn, to avoid attacks, spells, and other hazards when their character is not acting. They believe that the caster will be vulnerable each round, even when they succeed on their Blink roll.
As it was, the character in question managed, with the aid of Boots of Speed, several Dexterity (Acrobatics) checks, and good Blink rolls, to run and tumble down the hill (very exciting!) while avoiding 3 bugbears, 3 worgs, 2 werewolves, 11 cultists, 3 evil druids, and a fire elemental while lighting half the camps on fire and causing much mayhem and hilarity. He was reunited with his party, horde in tow, and battle was joined.
So, to put this novel to rest: Was my ruling correct by RAW?