Cast Vadrok for its mutate cost by paying ({1} magic symbol) ({WU} magic symbol) ({R} magic symbol) ({R} magic symbol) , mutating it onto a non-Human creature.
The Vadrok mutated creature's mutate ability triggers, allowing you to cast Chance for Glory from your graveyard without paying its mana cost.
Saheeli triggers, creating a 1/1 Servo artifact creature token.
Resolve Chance for Glory, giving creatures you control indestructible, taking an extra turn after this one, and creating a delayed triggered ability.
Activate Crystal Shard by paying ({U} magic symbol) and tapping it, returning the components of the Vadrok mutated creature from the battlefield to your hand.
At the beginning of your end step, if this is an extra turn from Chance for Glory, Chance for Glory's delayed triggered ability triggers.
In response, activate Sundial of the Infinite by paying ({1} magic symbol) and tapping it, ending the turn and exiling the triggered ability.