Shimmering Mirage

Color-fixing dressed as a cantrip, with the targeting pointed at someone else's mana base as often as your own. Most land-typechanging effects of this era treated the conversion as the whole spell; here the conversion is incidental and the card draw is what justifies the two mana. The land you choose can be your own (to splash a color, to fix a stranded dual) or an opponent's, where changing their land's basic type strands them under a color-hosing effect or breaks the math on a mana-intensive turn. The "until end of turn" clause keeps the effect honest: this is a tempo and information play, not permanent disruption, and the replacement draw means it never costs you a card to make the swap. That cantrip rider is the design logic worth noting, because it converts a narrow utility instant into something you can run main-deck without fear of dead draws: when the type change is irrelevant, you still cycle through it for the card. It sits with the blue cantrips that bury a situational mode under a guaranteed draw, working from the premise that any spell is worth a card if it always replaces itself.