Phyrexian mana counts as the color in the background of the Phyrexian symbol
Profane Tutor One of the things I dislike the most about tutors is not having the mana to cast both the tutor spell and the one I search for, but Profane Tutor circumvents this neatly
However, you can play Jadelight Spelunker as a two-drop or dump a bunch of mana into it later in the game
Those seeking to do slightly less terrible things to their friends during casual commander games will find repeatable mass blink effects that net you cards (Cloudblazer, Unquestioned Authority, etc.), the ability to get around mana costs through the Manifest mechanic (Cloudform, Scroll of Fate, etc.), or even double mana from mana rocks is plenty sufficient when it comes to generating incremental value
Creatures you begin to control later in the turn and noncreature permanents that become creatures later in the turn won't get +2/+0
Sometimes you just want a creature to Traverse the Ulvenwald for that can kill any creature, so maybe we could play it as a one-off tutor target