To activate the 2 power crystals to open the door to help the woodsmith in Kena: Bridge of Spirits walk up the stairs in the back of the cave and use the new bomb throwing ability on the glowing blue rocks and shoot the blue glowing crystals with the bow to create a platform to go to the the upper level.
Go to the back of the area and slide down and complete the fight in the cave. The enemies here cannot be damaged unless you use the new bombs to open them up first and shoot the middle of them that is glowing.
Walk up the path at the light part of the cave and use the bomb to create a series of platforms to be able to climb up. On the higher level, throw a bomb at the glowing rock that is hiding the flower and then shoot at the flower. Throw another bomb at the platforms below, then shoot the crystal on the platform next to you and jump over to it and climb up to the next level. Clear the corruption and keep climbing.
Use the bomb on the glowing rubble and the crystals on the side of the pillar to spin the pieces of the pillar until the front of it is glowing.
Go back down and throw a bomb at the rubble on the other side of the cave. Climb onto the two platforms and throw another bomb at the rubble on the ground in front of you to create more platforms you can use to get up to the higher area.
Go up the stairs in the back all the way to the top and throw a bomb down onto the blue glowing rocks and use the platforms to go to the middle area on the left of the cave. Throw another bomb down and use the platforms to get to the other side of the area.
Go forwards until you find a broken pillar. Use a bomb to assemble the pillar and the crystals on the pillar to spin the pieces of the pillar so that each of them glows brightly.
Jump down, go onto the blue stone in the ground and use the pulse ability.