Reach
When Skyfisher Spider enters, you may sacrifice another creature. When you do, destroy target nonland permanent.
When Skyfisher Spider dies, you may gain 1 life for each creature card in your graveyard. If you do, exile Skyfisher Spider from your graveyard.
Notably, this means that players won't get to know what nonland permanent you plan to target before you choose whether to sacrifice a creature.
14-10-2022
wotc
Skyfisher Spider's first triggered ability doesn't have any targets. If you choose to sacrifice another creature, a second triggered ability (called a "reflexive" triggered ability) goes on the stack and you choose a target nonland permanent at that time. Players may respond to that second ability as normal.
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