Silumgar Monument — ruling 1

A Monument can't attack on the turn it enters the battlefield.

Silumgar Monument — ruling 2

Each Monument is colorless, although the last ability will make each of them two colors until end of turn.

Silumgar Monument — ruling 3

If a Monument has any +1/+1 counters on it, those counters will remain on the permanent after it stops being a creature. Those counters will have no effect as long as the Monument isn't a creature, but they will apply again if the Monument later becomes a creature.

Silumgar Monument — ruling 4

Activating the last ability of a Monument while it's already a creature will override any effects that set its power or toughness to a specific value. Effects that modify power or toughness without directly setting them to a specific value will continue to apply.

Silumgar Monument : règles, fonctionnement et interactions (MTG)

Silumgar Monument 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

: Add or . : This artifact becomes a 4/4 blue and black Dragon artifact creature with flying until end of turn.

How it works : Silumgar Monument

Original English text — Wizards of the Coast / Scryfall

#1February 25, 2015· Wizards of the Coast
A Monument can't attack on the turn it enters the battlefield.
No other card is named in this ruling.
#2February 25, 2015· Wizards of the Coast
Each Monument is colorless, although the last ability will make each of them two colors until end of turn.
No other card is named in this ruling.
#3February 25, 2015· Wizards of the Coast
If a Monument has any +1/+1 counters on it, those counters will remain on the permanent after it stops being a creature. Those counters will have no effect as long as the Monument isn't a creature, but they will apply again if the Monument later becomes a creature.
No other card is named in this ruling.
#4February 25, 2015· Wizards of the Coast
Activating the last ability of a Monument while it's already a creature will override any effects that set its power or toughness to a specific value. Effects that modify power or toughness without directly setting them to a specific value will continue to apply.
No other card is named in this ruling.