Two stars
Four potions
Precision Charm
Go up and to the right and left sides to clear the bubbles to the row of black pairs of bubbles and beyond and around the doom skulls if possible. (Everything up to the black lines on the right and left sides on the screenshot will need to be cleared away before you burst the last linked bubble.)
Make access to three linked bubbles because you will need to use bank shots to reach them to shoot them.
Four potions
Precision Charm
Go up and to the right and left sides to clear the bubbles to the row of black pairs of bubbles and beyond and around the doom skulls if possible. (Everything up to the black lines on the right and left sides on the screenshot will need to be cleared away before you burst the last linked bubble.)
Make access to three linked bubbles because you will need to use bank shots to reach them to shoot them.
Burst linked bubbles using bank shots EXCEPT for one. NOTE: Leave at least one pair/set of black bubbles! You will need these to build “height” to reach around the doom skulls.
Do NOT drop the last pair of black bubbles until you have
successfully cleared away the bubbles up and around the doom skulls on both sides
of the infected triangle. Add bubbles under the pair of black bubbles until you can reach around the doom skulls (2-3).
Put your unwanted bubbles under the row of bubbles under the doom skulls and also under the reserved set of black bubbles.
AFTER you have cleared away all the bubbles under the black bubbles, and above and to the left and right sides of the doom skulls, then burst your last linked bubble. If you have cleared the bubbles properly, the entire triangle of infected bubbles and doom skulls will drop.
Put your unwanted bubbles under the row of bubbles under the doom skulls and also under the reserved set of black bubbles.
AFTER you have cleared away all the bubbles under the black bubbles, and above and to the left and right sides of the doom skulls, then burst your last linked bubble. If you have cleared the bubbles properly, the entire triangle of infected bubbles and doom skulls will drop.
It is then an easy march to the locked chain, even through
the crystal bubbles. You do not have to clear everything away before unlocking
the chain, but once unlocked, a bomb is activated at the top center, so make
sure you have left room to clear away nine holes to drop the ceiling before the
bomb goes off.