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
(It's also not an enchantment they can kill to get their dork back, by the way) But by discarding it for an effect, you net the effect as well as a powerful madness theft of something at instant speed that can change the tables very quickly
Get a head start filling it up with 4 booster packs from the special Scarlet & Violet - 151 expansion
1ST EDITION GRADED Premium Pack: WOTC Vintage Pokmon | 1999-2003 | 8-10 Mint 1X 1ST EDITION GRADED Card Mint 8-10 PSA, BGC, MGC, GetGraded, ACE
Once per turn, if a card(s) you control would be destroyed by battle or card effect, you can send 1 Fusion Monster that mentions "Fallen of Albaz" as material from your Extra Deck to the GY, instead
Is Ardyn, the Usurper legal to play