Any of the Simic Elf decks of late, Sea Monster tribal decks want this, and of course, any reanimator shell with a pretty common creature type might be able to squeeze the Titan in
Credit: Wizards of the Coast Pipping, Warden of Isengard is the second half to a Merry weenie deck, with a built in Overrun, which is fairly solid, though it's very telegraphed and doesn't give trample
It has 230 HP and an attack that does a respectable 140 damage
From lowest to highest, here is how many Pack Points each card costs based on rarity: 1 Diamond - 35 2 Diamond - 70 3 Diamond - 150 4 Diamond - 400 1 Star - 500 2 Star - 1,250 3 Star - 1,500 Crown - 2,500 Keep in mind that you can only hold a total of 2,500 Pack Points at a time
Then, make sure to kill the fear creature doing so