Rising Miasma
A symmetrical sweeper with a fail-safe stapled to its back end. The base mode shaves two toughness off every creature on the board, clearing tokens and small aggressive stances while leaving anything with three or more toughness upright: a measured wrath, not a full wipe. The awaken cost patches the classic weakness of symmetrical removal, that you spend a turn evening the board and are left holding nothing on it. Pay and the same -2/-2 hits everyone, but you also animate a land into an Elemental carrying three +1/+1 counters. The timing is the trick worth understanding: a spell's continuous effect locks in the set of objects it affects the moment it resolves, and the land is not yet a creature when the -2/-2 measures the battlefield, so it dodges the penalty entirely and arrives as a full 3/3 with haste. That is a real body swinging into an emptied field, not the whittled-down token the raw math might suggest. Awaken always trades on the fragility of the thing it makes, and parking a chunk of your mana base on the table as an animated land is a genuine gamble; anything that kills creatures or sweeps again takes both the body and the land with it. Rising Miasma packages that gamble into removal that scales from a cheap early answer into a self-replacing, if fragile, tempo swing in the late game.
