Turn to Frog and Tree of Redemption

[TheJord]

I stack Tree of Redemption's life swap ability. In response, it gets hit with Turn to Frog.

Does his ability resolve? Or is it lost, as Turn to Frog states?

[MarcinS]

I stack Tree of Redemption's life swap ability. In response, it gets hit with Turn to Frog.

Does his ability resolve? Or is it lost, as Turn to Frog states?

Once effect is on the stack, it's never lost. So you will get down to 1 life, as that's the toughness of the creature. Interestingly, if you kill the Tree in response to Turn to Frog (or sacrifice it), the effect will use "last known information", which will be the toughness of the creature when it was leaving play, which was 13 (or whatever the toughness was at the time).

[MarcinS]

Oh, actually, if the tree is gone before resolution, you can't exchange life with it anymore, so the effect "fizzles", sorry for the confusion.

[FM]

The Tree of Redemption is now a 0/1 blue frog with no abilities... but it's still the same object. For instance, if someone chucked a Doom Blade at it, and you cast Momentary Blink in response, the Tree leaves (pun intended) play and returns to play. Sure, it's the same card, probably on the same spot on the table, but for the game, it's a new object, so Doom Blade checks for that other Tree of the Redemption it was supposed to kill, fails to find it, and heads gloomly to the graveyard. If you cast Turn to Frog, on the other hand, Doom Blade sees the Tree trying to paint itself blue and don a frog costume, and still nails it. This explains MarcinS' answer, as once the ability is on the stack, it'll try to resolve and do as much as it can, so it'll start to resolve, find the Tree (it's still the same object, remember?) and do the life swap, only now it's toughness is 1.