So an interesting card I thought of with this is the land Raging Ravine, enters tapped, taps for red or green. The land has an activated ability for 2RG, becomes a 3/3 and "Whenever this creature attacks, put a +1/+1 counter on it.”. A trick I learned with this land is you can activate that ability multiple times to get a ton of +1/+1 counters on it when it swings. Since it turns into a creature after that first activation, Agatha's discount kicks in and you can have a very scary big land creature ready to pop out when you need it. Also while less budget a similar trick can be done with the red land Den of the Bugbear, and you can do something similar with Lair of the Hydra, do one activation cheap to make a creature then you can activate it again with the discount to make it bigger.
