Farryn, Willing Eyeblight

Whenever a you cast a Bird spell, create a 3/3
green Beast creature token with Trample.
Whenever you cast a Beast spell, create a 2/2
blue Bird creature token with Flying.
At the beginning of your pre-combat main phase
add {g} for each Beast you control and {u} for each
Bird. Use this mana only to cast Bird or Beast
spells. Birds and Beasts cast with this mana have Deathtouch.