Somberwald Alpha — ruling 1

Somberwald Alpha’s first ability will give each creature you control that becomes blocked +1/+1 until end of turn. It doesn’t matter how many of your opponent’s creatures are blocking each of your creatures.

Somberwald Alpha : règles, fonctionnement et interactions (MTG)

Somberwald Alpha 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

Whenever a creature you control becomes blocked, it gets +1/+1 until end of turn. : Target creature you control gains trample until end of turn. (It can deal excess combat damage to the player or planeswalker it's attacking.)

How it works : Somberwald Alpha

Original English text — Wizards of the Coast / Scryfall

#1June 22, 2015· Wizards of the Coast
Somberwald Alpha’s first ability will give each creature you control that becomes blocked +1/+1 until end of turn. It doesn’t matter how many of your opponent’s creatures are blocking each of your creatures.
No other card is named in this ruling.