Catch-Up Mechanic CW05/477 (Un-Known Event Playtest Cards) Grand Archive Lands you control have "{T}:

Lands you control have "{T}: Add one mana of any color

if it's not your turn

[Class Bonus] As long as your champion is attacking a rested unit

Each opponent's maximum hand size is reduced by seven

Catch-Up Mechanic CW05/477 (Un-Known Event Playtest Cards) Grand Archive Lands you control have "{T}:When this creature enters, choose one. If an opponent has at least 5 more life than you, choose any number instead Put two +1 +1 counters on another target creature or Vehicle. Return target artifact card from your graveyard to your hand. Look at the top five cards of your library. Reveal an artifact card from among them and put it into your hand. Put the rest on the bottom in a random order.