Vedalken Mastermind + Fiend Hunter : Cast Hunter wait for enters the battlefield effect to go onto stack, before the effect resolves, return the Hunter to your hand. This puts the Hunter leaves the battlefield effect above the enters the battlefield ability on the stack, thus resolving first, as it resolves before the target has been exiled it cant return it thus it fizzles, now the enters the battlefield effect resolves removing the card forever from existence and with Hunter back in hand.
Vedalken Mastermind + Oblivion Ring : Cast O-ring wait for enters the battlefield effect to go onto stack, before the effect resolves, return the O-ring to your hand. This puts the O-Rings leaves the battlefield effect above the enters the battlefield ability on the stack, thus resolving first, as it resolves before the target has been exiled it cant return it thus it fizzles, now the enters the battlefield effect resolves removing the card forever from existence and with O-ring back in hand.
Vedalken Mastermind + Journey to Nowhere : Cast Journey wait for enters the battlefield effect to go onto stack, before the effect resolves, return the Journey to your hand. This puts the Journey leaves the battlefield effect above the enters the battlefield ability on the stack, thus resolving first, as it resolves before the target has been exiled it cant return it thus it fizzles, now the enters the battlefield effect resolves removing the card forever from existence and with Journey back in hand.
Sundial of the Infinite + Glimmerpoint Stag : With Sundial in play cast Glimmerpoint, at the beginning of your end step before the Glimmerpoints secondary effect resolves, use Sundial to end your turn, the glimmerpoints secondary effect gets removed from the stack and the exiled card never returns to the battlefield. (add Venser, the Sojourner to trigger this combo every turn)
Sundial of the Infinite + Flickerwisp : With Sundial in play cast Flickerwisp, at the beginning of your end step before the Flickerwisps secondary effect resolves, use Sundial to end your turn, the Flickerwisps secondary effect gets removed from the stack and the exiled card never returns to the battlefield. (add Venser, the Sojourner to trigger this combo every turn)