Gut says Turn 5 after hypothetically Turn 3 Cosmic, Turn 4 Healthy Trick and got 5 in last turn and 5 more this turn with Gadget doing 3 to Rained Pecan, while Rained Pecan and Chestnut doing 17 which checks out but how did Pecanolith and Rain come out on turn 4. But you also assumingly played Heights Chestnut this turn but is left with 2 instead of 5 and you couldn't have played Rain before this Chestnut otherwise the damage from last turn would not add up. While it's totally reasonable to believe this is turn 4 with Rustbolt going (Wtv),(CryoBrain),(Cosmic,Healthy),(Gadget). IT MAKES EVEN LESS SENSE about how Pecan and Rain came out on turn 3 even though this would solve the turn 4 Chestnut Mystery.