Founding Titan (IPG)

The Founding Titan is one of the nine playable titans the player can use. Originally used by Ymir Fritz, she was suceeded by its current possessor, Eren Yeager. The Founding Titan has low overall HP, but can stack itself with any titan (aside from itself). It can summon NPC and Player Mindless Titans to help it out in battle as long as you have Royal Blood. It has the ability to harden its fists, and by extension its entire body.

Stack Effects
The Attack and Armored stack grants this titan boosted damage on light attacks.

The Female, Cart and Jaw stacks grant boosted running speed

The Colossal, Beast and Warhammer grants it more heavy attack damage.