If this happens, Rhys the Redeemed could be played in a mono-green deck (by treating his cost as green) or a mono-white deck
In MTG, if multiple replacement effects are affecting the same player, object, or event, the player being affected, or the player who controls the affected object, is the one who chooses how to apply replacement effects
And considering you can create mana and draw cards, it won't be hard to chain creatures together and get all three options
Creature Human Rogue2/2 Growth Value TODAY YESTERDAY (6%) 1 WEEK (6%) 1 MONTH (-1%) Unlock the potential of your card collection
There are tons of ways to recur artifacts from your graveyard to your hand or even the battlefield, so even if you discard the artifact you searched up, you can bring it back with cards like Daretti, Scrap Savant and Refurbish
Squall Line adds another to the mana cost, but gives you a redundant copy in Commander