Tomb Lord has long been in the shadow of Stag Knight and Tayrel as champions who could do both decrease defence and attack. His kit provided poisons but his cooldowns were substantial and many opted for the more reliable debuffs.
In Patch 4.70, Tomb Lord moved from a strong vault guardian to one of the best legendary champions in the game. His poisons damage was effectively doubled with duration moving from 1 to 2 turns and his A3 had a turn reduced allowing him top place his debuffs every 4 turns when booked instead of 5. These changes make Tomb Lord strong as both a solo dungeon runner and as part of any dungeon team.
A great set of buffs for a champion feeling the pressure of the power creep!