1to5, or a small sum (<caster.level>*2+5).
Text is resolved per recipient, so <target.name> is each player’s own name when one message reaches several.
Who
Every entity placeholder starts with who it is about:<caster> alone, with nothing after the prefix, is its name.
What
Add any of these after the prefix:<target.hp>, <caster.l.x>.
Variables
An unset variable is empty, and numbers print without a trailing
.0.
Skill values
Everything else
MythicMobs’ escape codes for characters YAML or the line syntax would otherwise eat work too:
<&co> for :, <&sc> for ;, <&cm> for ,, <&eq> for =, <&lc> and <&rc> for { and }, <&lb> and <&rb> for [ and ], <&nm> for #, <&sp> for a space, <&nl> for a new line.
Addons can add their own prefixes; see Extending the Effect Language.