Weaver of Harmony does not have summoning sickness.
An opponent controls at least three lands.
({G} magic symbol) ({G} magic symbol) available.
Steps
At the beginning of your precombat main phase, Carpet of Flowers triggers.
Holding priority, activate Weaver of Harmony by paying ({G} magic symbol) and tapping it, copying Carpet of Flowers's ability.
Resolve the copy of Carpet of Flowers's ability, targeting an opponent that controls at least three lands, adding at least ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) .
Activate Pemmin's Aura's second ability by paying ({U} magic symbol) , untapping Weaver of Harmony.
Activate Weaver of Harmony by paying ({G} magic symbol) and tapping it, copying Carpet of Flowers's ability.
Resolve the copy of Carpet of Flowers's ability, targeting an opponent that controls at least three lands, adding at least ({G} magic symbol) ({G} magic symbol) ({G} magic symbol) .
Activate Pemmin's Aura's second ability by paying ({U} magic symbol) , untapping Weaver of Harmony.