Odin, Defender of Light

Odin Defender of light has +1/+1 for each ring counter on it. If Odin Defender of Light has more than 10 ring counters exile this creature.
{2}{r}: Put a ring counter on Odin, Defender of Light. as long as there is a ring counter on Odin, Defender of Light, at the beginning of your upkeep put another ring counter unless you discard a card. You may discard your hand to remove all ring counter, do this only if you have more than 5 cards