Rosie Cotton of South Lane There are a lot of ways to go infinite with Rosie Cotton of South Lane
Kefka, Court Mage // Kefka, Ruler of Ruin is also a standout
You can always upgrade the tribe with generic upgrades like Metallic Mimic, Adaptive Automaton, Coat of Arms, or Door of Destinies too
Even within the rules of fan-art I listed above: people buying it know theyre buying a proxy, a replicated card (at least, assuming its not someone trying to hock a proxy off as being authentic) the fact that it does use authentic artwork is tricky, and maybe the most grey of greys involved proxies dont interfere with the rights-holders from selling cards because, well, the rights-holders dont get ANY money from the secondary market to begin with
This is much more of a risk than Bear as getting it killed for free is a much bigger tempo loss for yourself
Finally, I wanted to include some on-brand game enders in case the generic merfolk beatdown is stymied