Ramroller — ruling 1

If, during its controller's declare attackers step, Ramroller is tapped or is affected by a spell or ability that says it can't attack, then Ramroller doesn't attack. If there's a cost associated with having it attack, its controller isn't forced to pay that cost. If they don't, Ramroller doesn't have to attack.

Ramroller : règles, fonctionnement et interactions (MTG)

Ramroller 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

This creature attacks each combat if able. This creature gets +2/+0 as long as you control another artifact.

How it works : Ramroller

Original English text — Wizards of the Coast / Scryfall

#1June 22, 2015· Wizards of the Coast
If, during its controller's declare attackers step, Ramroller is tapped or is affected by a spell or ability that says it can't attack, then Ramroller doesn't attack. If there's a cost associated with having it attack, its controller isn't forced to pay that cost. If they don't, Ramroller doesn't have to attack.
No other card is named in this ruling.