Dynacharge is a common Instant card from Modern Masters 2017 (MM3), collector number 94. Current market price: $0.11 (foil $0.24), TCGplayer market prices via Scryfall.
Target creature you control gets +2/+0 until end of turn. Overload {2}{R} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")