Why would you use Polymerization in a Fusion-based Deck?



After the first Predaplant event was held, the Decklist for the event has been posted online, revealing that the last 3 Predaplant cards in the set are reprints of the INOV Predaplant cards. (Predaplant Flytrap, Predaplant Moray Nepenthes and Predaplant Squid Drosera)

The Decklist, for those who are interested:

Monster Cards (20):

3 Predaplant Sundew Kingii

2 Predaplant Squid Drosera

3 Predaplant Spino Dionaea

3 Predaplant Sarraceniant

1 Predaplant Drosophyllum Hydra

2 Predaplant Pteropenthes

2 Predaplant Flytrap

1 Predaplant Moray Nepenthes

3 Lonefire Blossom

Spell Cards (15):

3 Predator Planter

3 Predator Graft

2 Fusion Substitute

1 Super Polymerization

1 Foolish burial

2 Twin Twister

2 Super Solar Nutrient

1 De-Fusion

Trap Cards (5):

2 Predator Planet

1 Pollinosis

2 Breakthrough Skill

Extra Deck:

3 Greedy Venom Fusion Dragon

3 Starving Venom Fusion Dragon

3 Predaplant Chimera Rafflesia