Vined

Vined is a negative status that roots the victim in place. While it is active, movement is completely disabled — you cannot walk, reposition or flee until the vines release you.
The only documented source is the Corrupted Seeds gear piece. The immunity list is long and mirrors Chained: the Enderman and its soul-corrupted variant, Prime Enchanter — Minecraft Dungeons II Boss Guide, the Twisted Warden — Minecraft Dungeons II Boss Guide, the Copper Monstrosity — Minecraft Dungeons II Boss Guide, Mosstrosity — Minecraft Dungeons II Final Boss Guide, the Redstone Monstrosity — Minecraft Dungeons II Boss Guide, the Sculk Monstrosity, Monarch — Minecraft Dungeons II Boss Guide, Monarch's Echo — Minecraft Dungeons II Boss Guide, Monstrous Opus, the Supreme Evoker — Minecraft Dungeons II Boss Guide, the Warden and its soul-corrupted twin, the Dartback and its soul-corrupted variant, and the Soul Corrupted Witch — 17 mobs including every major boss.
Tactically, Vined is total immobilization without the spreading behavior of Chained, making it a single-target lockdown tool. Like Chained, it is devastating against regular mobs but nearly useless against bosses, who are almost all immune. Pin a dangerous elite with Corrupted Seeds, then pour area damage into it while it cannot close the gap. Compared with Webbed, which merely slows movement and blocks rolling, Vined is the harder lockdown — but also the harder one to land on anything that matters.
