[Résolu] Question de noob - Malakir Bloodwitch

603. Handling Triggered Abilities

603.1. Triggered abilities have a trigger condition and an effect. They are written as “[Trigger condition], [effect],” and begin with the word “when,” “whenever,” or “at.” They can also be expressed as “[When/Whenever/At] [trigger event], [effect].”
603.2. Whenever a game event or game state matches a triggered ability’s trigger event, that ability automatically triggers. The ability doesn’t do anything at this point. [...]
603.3. Once an ability has triggered, its controller puts it on the stack as an object that’s not a card the next time a player would receive priority. See rule 116, “Timing and Priority.” The ability becomes the topmost object on the stack. It has the text of the ability that created it, and no other characteristics. It remains on the stack until it’s countered, it resolves, or an effect moves it elsewhere. [...]
603.6. Trigger events that involve objects changing zones are called “zone-change triggers.” [...] The most common zone-change triggers are enters-the-battlefield triggers and leaves-the-battlefield triggers.