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.
Heat Wave has 1 listed printing; the most valuable is the printing from VIS at US$0.24 on TCGplayer's market price. Prices below are the cheapest in-stock listing in the United States.
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