⎛⎝( ` ᢍ ´ )⎠⎞ᵐᵘʰᵃʰᵃ

⎛ ⎝ and ⎠ ⎞ are bracket pieces from Unicode's Miscellaneous Technical block, made for building a parenthesis that spans several lines of a formula, with each UPPER HOOK on the top line and each LOWER HOOK on the bottom one. Here all four sit on a single line, two outside each ordinary parenthesis, so the face opens with ⎛⎝( and closes with )⎠⎞, and reading outward from the face, both sides go plain parenthesis, LOWER HOOK, UPPER HOOK. Between the parentheses, the GRAVE ACCENT ` and the ACUTE ACCENT ´ flank ᢍ, a Mongolian letter named ALI GALI TTHA, with exactly one space between each pair of neighboring characters. Attached to ⎞ with no space is ᵐᵘʰᵃʰᵃ, six modifier letters spelling muhaha, one of the ways English writes the laugh of a villain who is up to something. The account that posted it in March 2020 introduced it as a bat/vampire kaomoji, so it suits costume talk in late October and any harmless little scheme you are about to pull off.