Plaid Cymru has stepped up its campaign to impeach the prime minister over the war in Iraq.
The legal judgement was published on Thursday
The party has now released the text of the motion which will be put before the House of Commons.
It says Tony Blair should be put on trial in Parliament over his conduct in taking Britain to war.
Labour critics have dismissed the idea as nothing more than a silly stunt with no chance of success.
Plaid Cymru says impeachment - a power last used in 1806 - is the only way to hold Mr Blair to account.
Later this month the party will present a motion to Parliament to set up a committee of MPs to investigate Mr Blair's conduct.
Carmarthen East MP Adam Price has claimed there is evidence that Mr Blair lied over the reasons for going to war.
The motion highlights his admission that Iraq had no weapons of mass destruction, and cites the opinion of the United Nations Secretary-General Kofi Annan that the war was illegal.
But the impeachment bid is doomed to failure unless Plaid Cymru can win over more MPs.
Plaid's Adam Price says Blair must be brought to book
The UK Government says Tony Blair has already been cleared by four separate inquiries.
Plaid Cymru's parliamentary leader Elfyn Llwyd MP helped to draft the motion.
"The publication of the text of the motion will put to bed accusations that impeachment was nothing but a silly season stunt," he said.
"This is a real and serious course of action which we have not undertaken lightly.
"Since the publication of the report in the summer even more evidence has come to light which vindicates our position.
"If we allow Tony Blair's actions to go unchallenged, a precedent will have been set that a UK Prime Minister can deceive the Welsh and UK public and parliament and get away with it."
Plaid Cymru has said more than 20 MPs have backed the campaign for impeachment.
Donald Anderson, the Labour Swansea East MP and chairman of the Commons foreign affairs committee, has labelled it "no-hoper" and a "political stunt".