Internally, Meruin was both screaming in terror and shouting in annoyance. She was in fact very tempted to do both out loud. [i]Seriously? Why go after me!?[/i].

The tree part that Sol threw flew back straight at him, looking more like a dagger than tree bark. It was a pocket reflective barrier that Meruin kept in one of her books. It could reflect anything, but it had a finite energy span that Meruin couldn't recharge yet. It would reflect all objects (including people) around her until it ran out of energy. So far it was still at full strength.

The rock touched the runed paper but didn't do anything. It was designed so that it would react to people or a certain amounts (mostly large) of magical energy only. If it didn't then random animals and objects would set them off and waste good paper. 

[i][center]The door to my battlefield is open, yet it cannot be closed. 
Oh Terra, mother of Saturn, Lord of Time, father of Jupiter, King of the Skies!
You Grand Mother Earth, clad in green and grander than mountains!
Spill your boiling blood and fissure the earth with your might,
for this child who can and is willing to speak with you thus![/i][/center]

Meruin 'tsked' in annoyance. She still needed more time to complete the spell. She was 5 minutes short on time, and she was already rushing it!