Like the original Moat, Teferi's Moat is a card that a large percentage of decks simply cannot beat, and it puts many others on only a handful of outs
Check the Hologram Rare and mythic rare cards printed in and after Core Set 2015 (July 2014) have an oval hologram sticker at the bottom center of the card, under the text box
Number 92 Language Espaol Legal Formats Commander, Historic, Legacy, Modern, Pauper, Vintage Not Legal Formats Alchemy, Brawl, Competitive Brawl, Pioneer, Standard, Timeless Rulings (6/16/2023) You must sacrifice exactly one creature or pay an extra to cast this spell
One point against it is that it improves G/W Devotion where it already excels (lategame inevitability, green mana symbols, clunky creatures)
This ability does not have a target
Some players dont like to play against mono-blue and pressure you extra hard because they think youll ruin their fun with a slew of countermagic (which you might be planning to do)
