One particularly damning thing to note is this chart: This table shows that with 7 Swamp and 7 Plains, you will have the required Plains to cast a turn-3 Territorial Hammerskull only 85.9% of the time (on the play, in absence of mulligans or card selection)
You can only get a card that is also only two colors, but in a deck crafted to capitalize on this restriction, it wont be hard to hit at all
SR Super Rare Frightfur Tiger X DARK Level 6 [ FiendFusionEffect ] ATK 1900 DEF 1200 "Edge Imp Sabres" + 1 or more "Fluffal" monsters When this card is Fusion Summoned: You can target cards on the field, up to the number of Fusion Materials used for its Fusion Summon
High-Value Auctions for Yu-Gi-Oh
This thing is going to be a powerhouse in Goblin decks
However, due to Catapult Turtle's stats (which themselves can be blamed on the card's age), the Aqua Monster has been hit a lot harder than the Machine