Theres an immense satisfaction to attacking with a creature that has more swords than they can feasibly carry, and Esior & Ardenn still provide this great experience
For example, take Unwind: This "no mana" mechanic that debuted in Urza's Block came to dominate every tournament from Vintage and Legacy to Pauper, and has been used abusively to make mana with cards like High Tide or the Urzatron, as well as to rack up lethal storm counts
The current two most common examples, however, are Tornadus EX (who does more damage if theres a Stadium in play) and Terrakion NVI (who does more damage if a Pokmon on their side of the field was KOd)
Only a limited number remain in PSA 10 condition
Having three copies of Chrome Mox may also be useful: they let you turn all the colored spells you draw into mana sources, and youll need to race to lock your opponent out before they can deal with both of the Leylines
Then you spend seven mana at any time, not just sorcery speed, to discard X cards from your hand and exile the top X cards from your foe's library and you can play them while exiled for no mana