Thrumming Stone | Memory Lapse | Chandra, Hope's Beacon

(and one other card)

Cast any other spell, or wait for an opponent to cast one.
If you cast the spell,
Displacer Kitten triggers, blinking
Chandra.
Cast
Memory Lapse by paying ({1} magic symbol) ({U} magic symbol) , targeting that spell.
Chandra,
Displacer Kitten and
Thrumming Stone trigger.
Resolve the
Chandra trigger, creating a copy of
Memory Lapse, targeting the original
Memory Lapse.
Resolve the copy of
Memory Lapse, countering the original
Memory Lapse and putting it on top of your library.
Resolve the
Displacer Kitten trigger, blinking
Chandra.
Resolve the
Thrumming Stone trigger from step 3, revealing the top four cards of your library and casting
Memory Lapse without paying its mana cost.
Repeat from step 4.