The First Doctor can search up the TARDIS, which you can then make excellent use of thanks to both his and Susans abilities
they could also choose to put nothing into play, force your Kong to do 13 damage to itself, play Lash to finish it off, and then ambush in a champion while your gold is down
If you have all 3, you get an energy , a +1/+1 counter and 1/1 servo for (1), which creates a loop as long as you can keep paying (1)
So, if you mulligan twice, you put 2 cards on the bottom
Credit: Wizards of the Coast Composer of Spring FromTheShire: Love, love, love this card
Aang, at the Crossroads // Aang, Destined Savior This double-sided version of Aang allows you to bring an extra creature onto the battlefield if it's at the top of your library, then turns your lands into 2/2 creatures with haste once he flips