Ral, Caller of Storms — ruling 1

If some of the targets become illegal for Ral's second ability, the original division of damage still applies, and the damage that would have been dealt to illegal targets isn't dealt at all.

Ral, Caller of Storms : règles, fonctionnement et interactions (MTG)

Ral, Caller of Storms 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

+1: Draw a card. −2: Ral deals 3 damage divided as you choose among one, two, or three targets. −7: Draw seven cards. Ral deals 7 damage to each creature your opponents control.

How it works : Ral, Caller of Storms

Original English text — Wizards of the Coast / Scryfall

#1October 5, 2018· Wizards of the Coast
If some of the targets become illegal for Ral's second ability, the original division of damage still applies, and the damage that would have been dealt to illegal targets isn't dealt at all.
No other card is named in this ruling.

Interactions with other cards

These cards' text mentions Ral, Caller of Storms.

Ral's Dispersal

Return target creature to its owner's hand. You may search your library and/or graveyard for a card named Ral, Caller of Storms, reveal it, and put it into your hand. If you search your library this way, shuffle.