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I doubt I'll have the time to get the reqs this time but i would vote for a ban for sure, land is a huge pain for the meta due to its ability to wreck balanced and stallish team with incredible ease, having like 0 counters ( besides mega latias yeah ) due to its ability + the movepool to expolit...
I don't think that bringing back Aegi will be that healthy for the meta: sure it can check / counter some big threats in ou, but it will just become another threat that is difficult to counter ( unless you want to put chesnaught / mandibuzz on every team, which screams overcentralisation ) and...
sorry man i got some irl stuff to do and couldnt connect before.. if you're there i can stay on for about an hour from now, on the ou room with the alt forgotten ghosts