Rizen Kurenai

+1: Until end of turn, Samurai's you control gain +1/+1 and have double strike.
0: Until end of turn, Rizen, Kurenai becomes a 1/1 Human Samurai creature with indestructible and "This creature gets +1/+1 for every Samurai
: creature you control." that's still a planeswalker. At the beginning of the next end phase, transform Rizen Kurenai.