Not only is this a limitless, instant speed, zero extra cost sac outlet (top marks on those three major categories) but it is also a relevant tool in its own right
The Amber and Amethyst deck is probably the easiest to master, while the Ruby and Emerald deck is the trickiest of the three to understand, although its probably the most flexible and adaptable of the three decks
Julius Jumblemorph Genemorph Imago Ghyrson Starn, Kelermorph Greater Morphling Hulking Metamorph Hydromorph Guardian Hydromorph Gull Ichthyomorphosis Jalira, Master Polymorphist Majestic Metamorphosis Manamorphose Mass Polymorph Metamorphic Alteration Metamorphic Blast Metamorphic Wurm Metamorphose Metamorphosis Metamorphosis Fanatic Mordenkainen's Polymorph Morphic Pool Morphic Tide Morphling Nascent Metamorph Obscura Polymorphist Phyrexian Metamorph Polymorph Polymorphist's Jest Polymorphous Rush Reptil, Dinomorpher Spellmorph Raise Dead (playtest) Terramorph Terramorphic Expanse True Polymorph
Bria is a great representation of this, encouraging you to cast as many noncreature spells as you can to buff your entire team
It doesnt do you any good to double sleeve your cards and have the openings of both sleeves in the same direction
If you have a card that is key to your plan but something you want to use late and need to protect early such as an Elixir of Immortality then Lat-Nam's is a great call
