Ramosian Rally

Tapping a single creature instead of paying four mana is the trade this card lives on, and it only sweetens as your board widens. With a Plains in play, a swarm can fire off a mass +1/+1 mid-combat for the price of one attacker's damage, leaving its lands untouched and an opponent guessing at mana you never needed. Spend the four mana the conventional way and it reads as a plain team trick; commit to a flooded white board and the cost shrinks to something close to nothing. The Plains requirement and the tap clause work in tandem to scale the price to the deck rather than the card: from an empty board the spell does nothing worth doing, but from a wide one it pumps the team while the tapped body barely registers. This belongs to the old white-weenie identity, where rally effects existed to convert raw creature count into one decisive swing. The conditional pricing is the sophistication under what otherwise looks like a routine combat pump: the card is only free once you have already built the kind of position that wants it.