Clive, Ifrit's Dominant // Ifrit, Warden of Inferno

In the Commander variant, a double-faced card's color identity is determined by the mana costs and mana symbols in the rules text of both faces combined. If either face has a color indicator or basic land type, those are also considered. For example, Cecil, Dark Knight's color identity is black and white, since its front face is black and its back face has a white color indicator.

A nonmodal double-faced card enters with its front face up by default, unless a spell or ability instructs you to put it onto the battlefield transformed or allows you to cast it transformed, in which case it enters with its back face up.

Colorless and generic mana symbols ({C}, {0}, {1}, {2}, {X}, and so on) in mana costs of permanents you control don't count toward your devotion to any color.

Clive's Hideaway's last ability only cares if you control four or more legendary creatures at the time it resolves. You don't even have to control four or more legendary creatures when you activate it.

If a spell has {X} in its mana cost, you must choose 0 as the value of X when playing it without paying its mana cost.

Count the number of red mana symbols among the mana costs of permanents you control as Clive's triggered ability resolves to determine your devotion to red. If Clive is still on the battlefield at that time, it will be included in that count.