mobilize cards mtg it gains haste until end of turn Mobilize [POR #172] - Magic:

If you have the extra mana, you can do it all

All creatures now belong to a supported creature type, and all non-creature cards that produce creature tokens produce tokens that belong to a supported creature type as well, meaning that tribal synergies are going to be emphasized in Cumly Cube 1.2, as was an original goal of this Cumly cube

Instant access to the exact card you need will usually have a significant impact on the board state, up to and including a chance to win the game outright

You've got rummages for days if all you care about is synergizing with discard, but the elder dragon's greater appeal is what you're drawing , offering heavily discounted miracles on big instants and sorceries you draw