Slith Inciso (Etched Slith)
Slith Inciso 

Ogniqualvolta lo Slith Inciso infligge danno da combattimento a un giocatore, metti un segnalino +1/+1 su di esso. Quando lo fai, puoi rimuovere un segnalino da un altro permanente o avversario bersaglio.
Testo delle regole (Oracle, inglese)
Whenever this creature deals combat damage to a player, put a +1/+1 counter on it. When you do, you may remove a counter from another target permanent or opponent.
I corpi così naturalmente adattivi degli slith li rendevano i soggetti ideali per il completamento.
Legalità
Chiarimenti sulle regole (in inglese)
2024-06-07
You don't choose a target for Etched Slith's last ability at the time it triggers. Rather, a second "reflexive" ability triggers when you put a +1/+1 counter on Etched Slith this way. You choose a target for that ability as it goes on the stack. Each player may respond to this triggered ability as normal.
2024-06-07
If there's more than one type of counter on the targeted permanent or opponent, Etched Slith's controller chooses which counter to remove.
2024-06-07
In a case where you put more than one +1/+1 counter on Etched Slith with its last ability (for example, because of the effect of Doubling Season), the reflexive ability will trigger once for each +1/+1 counter you put on it this way.