When Mairsil enters, you may exile an artifact or creature card from your hand or graveyard and put a cage counter on it.
Mairsil has all activated abilities of all cards you own in exile with cage counters on them. You may activate each of those abilities only once each turn.
![Mairsil, the Pretender [C17-041]](http://solstyx.com/cdn/shop/files/c17-41-mairsil-the-pretender.png?v=1781986546&width=1445)
![Mairsil, the Pretender [C17-041]](http://solstyx.com/cdn/shop/files/MagicBackRedoNoBG_6f8a99ba-b189-4434-ae3c-5e375291578d.png?v=1775753154&width=1445)