Use DNA Assimilation on the plant at the same time shape changing into the plant. Assimilate nearby animals, entangling them with shape-changing roots from below if needed.[/b] (I'm assuming we can feel their vibrations through the ground?)
Stand still, wait for any insect to touch us. Assimilate it
Your basic abilities are not as powerful as you assume them to be. A rolling assimilation, where one consumes a target while simultanously transforming into it, is at this moment outside your capabilities. In addition, changing form is not a rapid operation, at best, it is limited to the speed with which the original organism grew, at worst, for complicated chimeric combinations, it's several times slower.
Nevertheless, you attempt to eat the tree. It's thick bark effortlessly resists your onslaught of cells which slowly rub against it. Annoyed, you simply engulf and consume a nearby creature, slightly smaller than you. Unlike the tree, the Tardigrade puts up little resistance as you internal processes tear apart it's cells.
You're now sitting near a small patch of lichen on the tree, the likely origin of the now demised Tardigrade.
Name:
Energy:10/12 (actions cost one or more energy)
Biomass: 0.002 cm
3Abilities : DNA assimilation
Current look: A blob of cells, the size of two particularly large grains of sand
0.001 cm3 class
Tardigrade
Stylet : A primitive hardened mouthpart, used to pierce plant cells and consume their insides
Cryptobiosis : The Tardigrades fascinating survival strategy, where in it dehydrates and slows it's metabolism to a crawl, surviving for decades until conditions improve
Primitive : A more flexible, but far less hard and durable exoskeleton
Eutelic : All tardigrades of the same species have the same number of cells, determined by a system in their DNA. These limits can be troubling to override.