How can you create a combo with Lord Xander, the Collector, Fraying Sanity?
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[START OF COMBO]This combo can be formed with Lord Xander, the Collector, Fraying Sanity

Color identity: UBR
Mana cost: 
Steps:
  1. Declare Lord Xander as an attacker, attacking the opponent enchanted by Fraying Sanity.
  2. Lord Xander's second ability triggers, causing the opponent to mill cards equal to half their library size, rounded down.
  3. At the beginning of your end step, Fraying Sanity triggers, causing the opponent enchanted by Fraying Sanity to mill cards equal to the number of cards put into their graveyard this turn.[END OF COMBO STEPS]

Result:
  - Infinite mill for target opponent[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Fraying Sanity attached to an opponent with an even library size.
  - Lord Xander does not have summoning sickness.
[END OF COMBO PREREQUISITES]
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