CATACLYSM mechanics: Colossal, Herald, and Shatter

Colossal +X

Whenever this minion is summoned, its X named parts are summoned too. Those parts are called appendages.

Herald

Summons a Soldier with the effect of a class Colossal appendage. Every second Herald use makes that effect stronger, up to four uses. Deathwing uses a special version.

Shatter

Splits the card into pieces at opposite ends of your hand. Play the cards between them to make the pieces touch. They join again with both effects. You can also play either piece on its own.

Plan the space and cost

Colossal parts need room on the board. A crowded board may stop you from getting all of them.

Herald needs setup. Track the actual uses, not just the turns passed. Its early plays and later reward both need to help your deck.

With Shatter, count the cards between the pieces and the Mana needed to play them. Joining the pieces may be strong. Using one now may be better if it saves you or keeps you ahead.