Kira, Great Glass-Spinner

Protection for an entire board, granted by a fragile flier that wants the protection most. The mechanism is a counter, not a redirect: every creature you control gains a once-per-turn trigger that counters the first spell or ability to target it, so a one-mana removal spell does not just fail, it gets consumed. Across a wide board that tax compounds, because each cheap answer now only strips a shield instead of resolving its effect. The discipline built into the design is "for the first time each turn": the shield refreshes between turns but is single-use within one, so a determined opponent answers Kira herself by pointing one throwaway spell at her to strip the counter, then resolving the real removal. She protects the team but cannot fully protect herself, and a 2/2 with flying is not hard to clear once the first shield is spent. This is the soft-lock pivot from raw evasion to attrition denial: tempo and tap-out decks that flood the board care less about her body than about how she warps a removal-heavy opponent's math, turning every targeted answer into a two-for-one. Worth noting the counter triggers on any first targeting, friendly or hostile, so your own Auras and pump spells trip the shield if you are not sequencing around it.