Rime Transfusion

The double snow dependency is what locks this aura into one kind of deck. The +2/+1 bump asks for nothing, but the evasion clause leans on the supertype at both ends: paying the requires a snow source, and the only blockers that still stop the creature are snow creatures the opponent almost never has on the board. Outside a manabase committed to Snow-Covered lands and snow permanents, that activation cost simply cannot be paid, so the line never comes online and the creature just gets bigger. Inside a snow shell, the same sources powering everything else quietly buy unblockability on a body you were already trying to push through, with no real answer across the table. This sits among the snow-era designs that asked you to commit your lands to the supertype before any payoff turned on, an all-or-nothing deckbuilding tax that aged poorly once the supporting cards thinned out. The usual aura friction applies (a removal spell on the enchanted creature is a clean two-for-one), but the snow gating is the real character: it rewards what you put in your manabase, not what you put on the battlefield.