Can you respond to a fetchland activation with a card that cares about lands entering the battlefield?

When you activate a fetchland (e.g., Flooded Strand), the ability goes on the stack and players receive priority. Any player may respond with instants or activated abilities before the fetch ability resolves. However, once the ability resolves and the land is put onto the battlefield, that event itself is not a spell or ability — it simply happens as part of resolution, and cannot be responded to mid-resolution.

What this means practically: you can respond to the fetch activation before the land enters. For example, if you control a card like Lotus Cobra, the trigger "whenever a land enters the battlefield" will trigger after the fetch resolves and the land enters — that trigger then goes on the stack and players get priority again. So your opponents cannot prevent Lotus Cobra from triggering, but they can respond to the trigger itself.

If your card cares about lands entering (like Scapeshift resolving or an ETB trigger from something like Risen Reef), those triggers are placed on the stack after the land enters as part of the fetch's resolution, per CR 603.2. Players then receive priority and may respond to those triggers.

Concrete example: You activate Flooded Strand. Your opponent casts Stifle in response — this counters the fetch ability itself, so no land enters at all. If they instead wait for the fetch to resolve (land enters), Lotus Cobra's trigger goes on the stack and they could Stifle that trigger instead. The land entering cannot itself be Stifled mid-resolution.

Key rules: CR 116.2b (players receive priority after a spell or ability resolves), CR 603.2 (triggered abilities trigger when their condition is met and are placed on the stack the next time a player would receive priority), and CR 509.2 (activated abilities are placed on the stack when activated).