Chris Rahns Emberheart Challenger from the Bloomburrow set was awesome
This card gives us another way to use our mana on turns our opponents try not to play into our answers, and its also a threat that can take over the game
Black Rob Lucci: Jack & Whos Who Jack (OP08-084) became an instant staple in Rob Lucci decks, providing top-end removal and board control that black strategies lacked
Its not especially exciting, but its useful, especially with so many artifacts in this set
However, one of the defining characteristics of Mono-Blue Tempo is evasion, and Im not sure if mashing a huge creature into a bunch of otherwise irrelevant walking blockers meshes well with a bunch of small flyers
This card being black also means that any deck its in has a big chance of having cards that can bring it back from the graveyard, so you shouldnt be too afraid to attack with it and fill your field with zombies