The ease of fighting is completely different depending on whether or not this card is present, so it is a card that I want to protect as much as possible
Phantasmal Terrain (Aaron) UU Enchantment Aura Enchant land As Phantasmal Terrain comes into play, choose a basic land type
While Wizards owns a lot of the IP on Magic cards (the art, mana symbols, etc.) there is t nothing illegal about a piece of cardboard the same size of a Magic card with some unique custom art that might look a bit like a Mox, an Underground Sea, or a Wheel of Fortune
Any time you create creature tokens, Chatterfang doubles them with Squirrels, boosting your board even faster
You can do that with one card pretty easily and so for Exploration to be worth it you need to really take advantage of the mana or two you save and the slightly earlier ramp it can bring