Battering Krasis

Evolve was an attempt to bottle the same payoff curve a generic +1/+1 counter engine gives you, but tied to the natural rhythm of casting your curve out. A 2/1 with trample is small enough to trigger off almost any later creature: drop a three-power threat and the Krasis grows, drop something tougher and it grows again, all without a dedicated counter source or an extra mana sink. The trample is the part that makes the mechanic worth the body. A vanilla creature accumulating counters just gets chump-blocked into irrelevance; trample means every counter you add converts directly into pressure that can't be parked behind a single blocker. The design tension is that the growth runs in only one direction along the curve. Once the Krasis is the biggest thing you control, it stops evolving, so it rewards a board built bottom-up rather than top-down, with this card cast early and the rest of your hand sized to outpace it. That makes it a deliberate early play in a green tempo shell rather than a midgame topdeck: the counters you bank depend entirely on how many bigger bodies come down behind it.