The activation was added to similarly imply that she was using speed to help others move quicker
Triplicate Titan Triplicate Titan produces three token creatures to replace itself, meaning unlike other high mana value creatures it isnt as devastating if this card gets removed
It draws cards at a rate that Rowan, Scion of War is happy with, and you can pay a lot of life when you have the mana to untap it
For Worldpurge, that means blinking a bunch of cards out of play, resolving this 8-mana sorcery, then being the only one left with a board when your cards re-enter
It also plays great with equipment that grants attack triggers, such as Argentum Armor and Armory of Iroas, adding another string to your dual-trigger bow
In fact, deciding what cards to cut was my biggest issue with these Sealed decks