voici comment il faut le comprendre : Les joueurs ne peuvent pas [payer de points de vie] ou [sacrifier des permanents non-terrain] [...]
the gatherer : If a spell or activated ability has a cost that requires a player to pay life (such as the activated ability granted by
Lithoform Blight) or sacrifice a permanent (such as Kazuul’s Fury or Spare Supplies), that spell or ability can’t be cast or activated.
Et donc tu ne peux pas fetcher avec scalding tarn.