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Players can't cast spells by paying alternative costs or without paying their mana costs. (Additional costs are still okay. Anything that replaces the mana cost like flashback or madness is not.)
Abilities, attacks, weakness & resistance
Other cards from Unknown Event
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Htbr, Racetrack Referee (RW02) is a legendary Homunculus creature from the Unknown Event expansion. It has a static ability preventing players from casting spells by replacing or removing their mana costs, enforcing that spells require paying their mana costs (additional costs still apply). As a white two-mana 2/2, it functions as a compact rule-modifier that can shape opponents' or your own combo and alternative-cost interactions.
Catalog pricing data as of 21 Apr 2026, 00:12
