RogSi shoved an Ad Nauseam in a win attempt and lost the stack war. You will be passing to Sisay who has assembled the board state to win on their next untap. Sisay has also revealed Fierce Guardianship during the previous push and is holding it to protect their win. Thrasios and Tymna has revealed no information, but used two counter spells a Flusterstorm and Mindbreak Trap and now has no mana open. Considering this is your last turn, sequence the best shove and articulate as clearly as possible the reasons for the actions you have taken.