People can get caught out when you drop menace on them, so holding Falthis back until the right moment can be a solid play
Adult collectors also have a role in price rises too
for example, if you use an effect that prevents damage to creatures you control, you can still take trample damage because the excess damage was assigned to you, the player

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Rounding things out, Id recommend Serah Farron as a great cost reducer in your Legendary-matters decks
Once Tameshi had his own lab, he began to study the nature of metaphysics on Kamigawa and developed the Reality Chip, a strange device that can be embedded into the skin and gives the user a mysterious connection to planar physics