Paradise Druid

The conditional hexproof is the whole design conceit: a mana dork that answers the oldest problem with mana dorks, which is that they die to everything. Birds of Paradise and Llanowar Elves ramp you, but a Lightning Bolt or a targeted removal spell costs you the acceleration and the card, usually on the turn you needed the mana most. This one protects the body by tying its immunity to a state you control: untapped, opponents cannot target it; tap it for its any-color mana and the shield drops until it stands back up. That trade is the price of the design. If you tap it on your turn and it stays tapped into the opponent's, that window is theirs to spend a removal spell in. So the shield rewards a specific play pattern (leave it untapped when you can afford to, tap it when the mana matters more than the immunity) rather than granting blanket protection. Sweepers still eat it, combat math still kills it, and edicts route around the hexproof entirely, so the answer is not "unkillable" but "cannot be picked off while you're holding it back." That any-color line does separate work: a two-drop that fixes across all five colors rather than a single wedge, which lets it anchor greedy multicolor bases and not just mono-green ramp. It is fixing and acceleration on a stick that mostly refuses to trade down, and the tapped-means-vulnerable clause is what keeps it fair.