Heat Wave is a uncommon Enchantment card from Visions (VIS), collector number 83. Current market price: $0.25, TCGplayer market prices via Scryfall.
Cumulative upkeep {R} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.) Blue creatures can't block creatures you control. Nonblue creatures can't block creatures you control unless their controller pays 1 life for each blocking creature they control.