The core effects of using tadpole abilities are actually pretty straightforward with specific triggers for major outcomes. Regular use gets reactions from your team where Lae'zel and Shadowheart will complain, but Astarion and Gale tend to encourage it. When you tap into these powers, you'll notice some visual changes like dark veins and eyes but nothing game-changing happens just from using them normally

The big decision points come late in the story first with the Astral-Touched choice, and then the Supreme Tadpole option in the finale. Taking that Astral path isn't permanent since Remove Curse fixes it but going full tadpole at the end leads to a specific, slightly darker outcome where you drift away from companions. Something worth noting is that despite all the warnings about losing control, regular power use won't lock you out of any main endings unless you specifically choose the ceremorphosis path

Tip: If youre trying for a completely tadpole-free run don't expect special recognition beyond some companion approval its mostly just for roleplay. Combat advantages from powers like Cull the Weak are pretty significant though so consider the tradeoff between story preferences and practical benefits

Quick reference: Standard use = cosmetic changes only Major choices = Astral-Touched (reversible) Supreme Tadpole (permanent) Companion views = split between approve/disapprove Main endings = all accessible except full ceremorphosis choice