Aether Spike is a common Instant card from Modern Horizons 3 (MH3), collector number 50. Current market price: $0.19 (foil $0.30), TCGplayer market prices via Scryfall.
Choose target spell. You get {E}{E} (two energy counters), then you may pay any amount of {E}. Counter that spell unless its controller pays {1} for each {E} paid this way.