This spell is a part of the Influence spell chain and is found in the Influence rune stone.
Dream does not abandon those it has touched. When Dream's Message ends and the target slips into sleep, Dream does not simply leave them there - vulnerable, unconscious, trusting. Dream stays. And Dream, when it decides to protect something, is remarkably thorough.
Dream's Protection is the mentimancer asking Dream to remain with the sleeping target a little longer - to wrap itself around them the way the best dreams wrap around the dreamer, complete and enveloping and deeply safe. The protection that follows is not physical armor in any conventional sense. It is Dream's conviction, made solid, the absolute certainty that this person is not done yet, that whatever they need to face when they wake is still ahead of them, and that nothing happening right now gets to take that away. The target's armor defense is increased by the mentimancer's Arcana plus Runic Power, and that protection extends equally against magic for Dream is not distinguishing between a blade and a spell when it has decided something is worth keeping safe. Those protected by Dream who are awake only receive the mentimancer's Arcana as protection - Dream isn't abandoning them, but is extra protective of the dreamers.
The dreamer sleeps on, unaware of what Dream is holding back on their behalf. That is perhaps the most Dream-like thing about this spell. The protection is given without the protected one even knowing they needed it.
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