Animar, Soul of Elements

A self-accelerating cost reducer that starts as a 1/1 and ends as a creature-spam engine: every creature you cast both grows the body and deepens the discount, so the second or third creature in a chain often has its generic cost wiped out entirely. The genius is that the discount compounds with the same triggers that fuel it, which is why this card became the canonical "cast my whole hand for free" piece in three-color creature decks. The protection from white and from black is not flavor padding: it walls off the two colors that traffic most heavily in targeted removal, so Swords to Plowshares, Path to Exile, and the whole suite of "destroy target creature" black answers simply have no legal target. (Edicts still bite, since those sacrifice effects point at the player rather than the creature, and a board wipe or a counterspell timed before the counters land does the job too.) That defensive shell is what makes the snowball reliable enough to build around: the engine rarely gets picked off mid-chain by a single spot removal spell, so the discount survives turn over turn. The body itself is almost beside the point; nobody runs this for the 1/1. What it represents is a clean expression of the "permanent that warps your mana costs" archetype, and it dies less than most because of who cannot legally point at it.