The Dragon Reborn: Mechanics

Tie the Weave: If you don't pay the Tie the Weave cost when you cast this spell, sacrifice this enchantment at the beginning of the next end step. Used on 5 cards: Fire Blossom, Mirror of Mists, Compulsion, Weave Pain, Harden Air

Represents the option to channel a weave quickly and cheaply or spend extra energy to tie it off.

Dreamwalk: Exile this permanent. Return it to the battlefield under its owner's control at the beginning of the next end step. Used on 3 cards: Wolf of the Dream, Moghedien, Lanfear

Represents leaving for Tel'aran'rhiod and then coming back.

Warder Bond: Target attacking or blocking creature that isn't already a Warder becomes a Warder. Put a +1/+1 counter on it. It gains "Sacrifice this creature: Regenerate the creature that bonded this creature." Used on 0 cards:

Represents channelers bonding warders.

In card text or details pages, write the mechanic's code name (playtest name) between square brackets, like "[Crittercast]", "[Bushido 1]" or "[Delay 4 {2}{R}{R}]". It will be expanded to the mechanic's name plus reminder text, such as "Suspend 4 – {2} {r} {r} . (Rather than cast this spell from your hand,...)"
To expand a mechanic's name but not its reminder text, include parentheses at the end of the square brackets: "[Crittercast()]", "[Delay 9 {R}()]".