Nina, Blueprint Master

Hexproof
Partner with Theresa, Schematic Master.
Whenever you build, draw a card.
If you control 3 buildings, this has first strike.
Whenever Nina, Blueprint Master
deals combat damage to a player, Build.
(Create a 0/0 building creature token, then put a +1/+1 counter on it or put a +1/+1 counter on a building you control.)