Elspeth's entire life is one Tear Jerker after another. She grew up on a plane ruled by Phyrexians, which is the height of Nightmare Fuel in of itself. She awakened her spark and escaped when she was thirteen, and for several years travelled the multiverse ( including finding her sword on Theros.). Then she came to Bant, and made it her home, becoming a knight and finding the comradeship and friends she dearly missed. But then the Conflux happened and her world fell apart around her, leaving her practically broken as Grixis invaded.
After that, she wandered again, and when Ajani found her in the arenas of Urborg, she refused to return to Bant because she felt she was unworthy of being a knight.
On Mirrodin, she is forced to watch the resistance fail and New Phyrexia rise despite her best efforts.
On Theros, she manages to become a hero by slaying the hydra Polukranos and then breaking the siege of Akros. It seems as though her misery is finally over when she and Daxos fall in love and she is a hero, but then Xenagos brings it all crashing down. First, he uses mind control to trick Elspeth into murdering Daxos, and then she becomes a scapegoat after he ascends into godhood. Blamed by all of Theros, Elspeth struggles on with Ajani's help and finally confronts Xenagos, slaying him with the Godsend.
To even reach Xenagos, she undertook the Ordeal of Erebos, which consisted of a Lotus-Eater Machine where she was married and had children on Bant. And she had to reject this illusion to advance. As a reward for this, she gained access to Nyx but also one request of Erebos. After slaying Xenagos, she asks to trade her life for Daxos'. But then Heliod enters, disarming her with ease, taunting her and then killing her with the Godsend out of sheer spite and jealousy.
Daxos' ultimate fate is just heartbreaking. Erebos does as Elspeth requests, but he revives Daxos as a Returned who wanders endlessly in search of Elspeth, who by this point is condemned to the underworld.
this troper belive that Daxos escape the underworld by himself, and for that reason become a Returned, meaning that the sacrife of Elspeth was for nothing
Her vision was hazy, but she could see Ajani kneeling beside her. His face was a mask of pain; his body seemed rigid with shock.
The flavor text for the Planeshift version of Slay. "The elves had the edge in guile, skill, and valor. But in the end, only sheer numbers mattered." To make things worse, the art shows the elves of Llanowar being overrun by Phyrexians.
Sorin finding the long-dead corpse of his friend Ugin on Tarkir. He loses all hope of combating the Eldrazi when he confirms that not a trace of his old comrade remains in spirit, echo or whatever remaining form but a miles-long-carcass.
Sorin and Nahiri, The Lithomancer, witnessing the extinguishing of an unnamed plane and it's last remnant of inhabitants in 'The Lithomancer'. And the knowledge that this is exactly what has happened numerous times before, and will continue for as long as the Eldrazi roam free.
The Lunarch's Journal and the defeated reaction of Comitant Dovid about the nature of The nature of Avacyn
"We are livestock. We are unwitting participants in our own cultivation. The church to which I have dedicated my life, the being that I have loved since birth, the boundaries of my world, all of it is a sinister lie. How strange this world is, and how cruel."