Galactic Puzzle Hunt 2019

Galactic Puzzle Hunt 2019, titled The Galactic Artifact, was the third iteration of the Galactic Puzzle Hunt, run by ✈✈✈ Galactic Trendsetters ✈✈✈.

Plot
A curious artifact is discovered in Antarctica. When assembled, it allows the solvers to contact alien civilizations, culminating in a Galactic Conference between the aliens.

Round 1

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Round 2
This round involves meta-matching as puzzle-meta correspondences are not given (only the number of metas that the puzzle feeds into, which can either be one or two.
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Artifacts
Additionally, the second round introduced a series of artifacts that were released concurrently with puzzle releases, intended to introduce solvers to the Puflantu alien language (which was constructed specifically for this hunt). The artifacts are not regular puzzles in that they do not have an answer that can be called in, but are instead used to learn the Puflantu language, both in terms of grammar as well as vocabulary. The conlang would be used in solving the metas and metameta.