Glyph of Reincarnation — ruling 1

First place all the affected creatures in the graveyard, then choose the appropriate number of creatures from the attacker’s graveyard and put them onto the battlefield. Some or all of them may be the same creatures which were just destroyed.

Glyph of Reincarnation — ruling 2

Yes, you can cast this targeting your opponent’s Walls to good effect.

Glyph of Reincarnation : règles, fonctionnement et interactions (MTG)

Glyph of Reincarnation is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

Cast this spell only after combat. Destroy all creatures that were blocked by target Wall this turn. They can't be regenerated. For each creature that died this way, put a creature card from the graveyard of the player who controlled that creature the last time it became blocked by that Wall onto the battlefield under its owner's control.

How it works : Glyph of Reincarnation

Original English text — Wizards of the Coast / Scryfall

#1October 4, 2004· Wizards of the Coast
First place all the affected creatures in the graveyard, then choose the appropriate number of creatures from the attacker’s graveyard and put them onto the battlefield. Some or all of them may be the same creatures which were just destroyed.
No other card is named in this ruling.
#2October 4, 2004· Wizards of the Coast
Yes, you can cast this targeting your opponent’s Walls to good effect.
No other card is named in this ruling.