Something that just came to me:
The Taxman -

Creature
Players cannot spend more than three mana per turn.
Whenever an opponent casts a spell with CMC

or without paying its mana cost, put a +1/+1 counter on ~.
1/1
That plus Glowrider + Teeg could be part of a nasty WW strat.
Just to be sure you understand the mechanic... You do realize that Glowrider and Teeg have no interaction, right? With both on the table, you pay

for Thirst, but Teeg does not prevent this.
Taxman + Glowrider is certainly nasty though. I like the card in general, but worry how printable it is. Seems like it could get really ugly in Standard (though in fairness they might be running enough removal to make it a nonissue).