The first one of these half and half decks I tried was a fairly big success and, as the title suggests, was a green build
Esika, God of the Tree / The Prismatic Bridge Esika, God of the Tree is best built with legendary creatures in the army so that they can tap and add one mana of any color when you need it
Any effects that applied to that permanent will continue to apply to it after it transforms
Artifact Urza, Lord High Artificer When Urza enters, create a 0/0 colorless Construct artifact creature token with "This token gets +1/+1 for each artifact you control." Tap an untapped artifact you control: Add
Next turn, you'll be at one life
TypeSorcery Collector Number37 Rarityrare ArtistAndrew Mar Put a +1/+1 counter on target creature, then double the number of +1/+1 counters on it