Khalid, One with Nature

Khalid, One with Nature’s power and toughness are each equal to the total amount of colored mana spent on spells last turn, but he’s at least 1/1. Whenever a player casts a noncreature spell, you may have Khalid, One with Nature become a legendary land and lose all other card types until end of turn. {2}{X}, {T}: Add X mana in any combination of {R}, {G}, and {U}. Spend this mana only to cast colored spells. {2}{R}{G}{U}: Target land becomes a 5/5 Elemental creature that’s still a land. Its color is each color of mana it could produce. When that creature dies, return it to the battlefield tapped under your control. Put two stun counters on Khalid, One with Nature.