Sundials.. suck. But there's no way to add BE without removing momentum, so let's say your opponent just doesn't play any.
New Puzzle
In a duo deck with no weapons, have an unstoppable (can't be stopped by ANYTHING) 3 damage, that will stop after 5 turns.
2 QTs
1 Deadly Poison
4 Silences
2 QTs give you 2 , 2
play poison, play silence
gain 2 each turn and draw another silence
continue until 5 turns have elapsed
Cheating, I know
Since there's no way to guarantee that your opponent will play purify, I believe this fail explains itself.
Edit: Unless Appawesome has something to say about sundials in his puzzle, I am going to post one.
New PuzzleWin the coin toss, use a mono deck and matching mark that’s not entropy, start with no pet. Before playing any cards on your fourth turn, have only 1 quanta from your mark, 1 card you just drew, no pillars, played four creatures of 1 quanta cost, and the ability to destroy your opponent’s pillars for the rest of the game without drawing any more pillars yourself no matter what your opponent does. Your opponent draws only pillars for his first three turns.
No pillars also means no pendulums, towers, or mark cards.
This might be a bit confusing; let me know if I should explain it more clearly.