Ali Baba — ruling 1

This ability may be used to tap more than one Wall per turn if you have enough mana, since tapping isn't part of the activation cost.

Ali Baba — ruling 2

The ability may tap walls even when Ali Baba is tapped or entered that turn, since the activation cost doesn't include {T}.

Ali Baba : règles, fonctionnement et interactions (MTG)

Ali Baba 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

: Tap target Wall.

How it works : Ali Baba

Original English text — Wizards of the Coast / Scryfall

#1October 4, 2004· Wizards of the Coast
This ability may be used to tap more than one Wall per turn if you have enough mana, since tapping isn't part of the activation cost.
No other card is named in this ruling.
#2October 4, 2004· Wizards of the Coast
The ability may tap walls even when Ali Baba is tapped or entered that turn, since the activation cost doesn't include .
No other card is named in this ruling.