Lotus Tree Altar

Carving the Totem spell was easier than Karl had expected. Unlike other spells, which were a complex set of System designed mana flows, the Totems were pure Elemental force given direction. 

When carved on a Nature Stone, getting the healing effect felt natural, and the process was finished even before Lotus called to announce that she had grown her tree statue.

Or perhaps it was an Altar to the Nature Gods?

When Karl walked out back, he realized that it was definitely an Altar. A face had been carved in the tree, and a small platform for offerings had been grown near ground level.

But that was perfect.

"Lotus, open the mouth a little, I need to put this inside." He instructed.

She complied without question, and Karl placed the carved stone in the tree statue's mouth. The face looked clearly draconic, partially emerged from the statue's surface, but there was no spot there for runes.