Fountain of Ichor — ruling 1

If you turn Fountain of Ichor into a creature but haven't controlled it continuously since your most recent turn began, you won't be able to activate its mana ability or attack with it.

Fountain of Ichor : règles, fonctionnement et interactions (MTG)

Fountain of Ichor 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 one mana of any color. : This artifact becomes a 3/3 Dinosaur artifact creature until end of turn.

How it works : Fountain of Ichor

Original English text — Wizards of the Coast / Scryfall

#1June 14, 2019· Wizards of the Coast
If you turn Fountain of Ichor into a creature but haven't controlled it continuously since your most recent turn began, you won't be able to activate its mana ability or attack with it.
No other card is named in this ruling.