Battle Plan is a common Enchantment card from Modern Horizons 2 (MH2), collector number 114. Current market price: $0.14 (foil $0.08), TCGplayer market prices via Scryfall.
At the beginning of combat on your turn, target creature you control gets +2/+0 until end of turn. Basic landcycling {1}{R} ({1}{R}, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.)