Fetching two lands is the going rate for 4 mana, and fetching two cards with the forest subtype means this green sorcery can do some serious fixing by grabbing dual lands or even Triomes
For example, if the card is a creature card, you can cast that card by paying its mana cost only during your main phase while the stack is empty
Llanowar Elves is worlds better since turn-1 ramp can be a killer, but that extra mana for a bit more resiliency does help against certain decks
It could be an excellent blue commander for a storm deck or just general spellslinger value by discounting cards like Nexus of Fate and Mnemonic Deluge
" Fogwalker: Spirit No.1, Limited
What sets Excalibur, Sword of Eden apart is the high MV, which can be offset by cards like mana rocks and affinity creatures, but the high cost is often a benefit for equipment commanders like Captain America, First Avenger