every 20 sec. Decrease Max HP by 10% and Increase damage output by 10%
#Arena
feral tapir
timber plaza
This is gonna kill stall comps 
harsh glade
Or at least reduce shielding and healing by a small amount every minute
defense comps shouldn't be able to just completely eschew any damage and Tank you for 5 mins straight
sterile hare
You can use the arti that goes through shield
tranquil crow
Agree with this, arena matches should never have time limits or reach them.
dire oracle
It gets much worse in s2 with ardreth ice/radiance teams.
Imagine acilia / felosia / mithrasea / ardreth / phaessa or gillian or garius or eurion or elecebre etc.
Although I heard they will add some kind of anti-stall timer to arena. Can't remember where I read it though.