when that reflexive triggered ability resolves, that player will lose the game no matter what their life total is
It's better than Gilded Lotus or similar things that only tap for 1 mana as you can spread the colorless into the various colors as needed
With some dedication and a little luck, getting the best free-to-play deck is not so hard
Paste a decklist and it tags every card by role ramp, removal, card draw counts those roles against a deckbuilding template, and reads your deck's bracket
I also think the deck might be interested in Showdown of the Skalds, Experimental Frenzy, or Rampaging Ferocidon in the sideboard and playing Lurrus precludes playing all of those
Shadowless cards can also be identified by their thinner HP font and the inclusion of 99 in the copyright date