Early game – Always replace for Crystal wisp, blood tears & hearth sisters. These are your bread n butter to control board, ramp to t h i c c e r minions and warbird away.  Rift walkers are also a great way to take away mana springs from opponent and break back-line eggs.

Mid game – Bloodbound mentors are important to keep extra warbirds, and cloud bombs (1 mana 4 damage is great). Cloud callers are probably vanar 2nd best removal minion / spell. Now your board is clean of minions you can play grimes on curve and warbird warbird warbird.

Late game – EMP is self explanatory, sunset those wanderers and buffed minions. By this point, you’ve already done enough warbirds. grimes wins you the game with a popped World Core golem.

When to use Hailstone prison – Wanderers / Early game  threats (ironcliffes, shadowdancers, krons, etc.)/ remove threat to win game.