Thrasios, Triton Hero often chills in the command zone until you have infinite mana to feed into its activated ability so you can draw your deck and win with Thassa's Oracle, but you can also exploit the activated ability with cards like Training Grounds and Seedborn Muse
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I like cards like this for decks like Fblthp, Lost on the Range or Yennett, Cryptic Sovereign, but it can even save certain cards you want to keep from a wheel effect or other hand manipulations
Its solid, but for me, its the weakest of the four out of the box
The mythic rare rarity was introduced with Shards of Alara and so I'd like to begin there, moving through the sets over the years
If your deck runs high-impact creatures, this enchantment can end games the moment it resolves