Illusion of Colossi

This deck uses Magnus, Ancient Herald, Spring Mochi, Aurora's Creation and Tale of the Old Turtle to reduce big creatures like Towship and Wavecrash to buff Grandeur...
Three Prophet of Tides and Towship serve to decrease Wavecrash's cost from early on, and 2 cost reductions from herald, spring mochi and tale will drop the cost under 2F.

EDIT: Although there are tasty mulligan like herald, magnus, lore thief and spring mochi, ignore them all and hard mulligan for towship and prophet. The number of cost reductions applied to Colossus will affect the midgame tastiness of under 1F.

This strategy doesn't always work well, so rely on Creationing Wavecrash to buff up Grandeur multiple times. It's surprisingly effective!
The Death Walker is for defense or plowing through the enemy's taunt walls. Tale can hit it to make a 1cost 6/4 cheap creature!

EDIT: 3 tale might be too much, so try to convert 1 luduan into 1 spring mochi. 1 tale into 1 herald and so on, according to your taste!