There is a combination that should not be allowed as he only needs to play 2 cards to win and have an unlimited turn. He plays halo fountain and gwenna, eyes of great resulting in him getting to use gwennas ability to get 2 mana to use halo fountains ability to untap a card and then draw a card. He then untapped gwenna and repeats the process going through his entire deck until he gets queza, augur of agonies where you take 1 damage for each card he draws which is unlimited. You physically cannot win and all he needs is 2 cards
There is a combination that should not be allowed as he only needs to play 2 cards to win and have an unlimited turn. He plays halo fountain and gwenna, eyes of great resulting in him getting to use gwennas ability to get 2 mana to use halo fountains ability to untap a card and then draw a card. He then untapped gwenna and repeats the process going through his entire deck until he gets queza, augur of agonies where you take 1 damage for each card he draws which is unlimited. You physically cannot win and all he needs is 2 cards