If you can find ways to copy this ability, make the most of tokens, or just have very silly cards in your graveyard, then Feldon is extraordinary
Commander: Card draw: Ramp & mana fixing: Land recursion: Graveyard fillers: Landfall & graveyard triggers: removal: Lands: Didn't make the cut: Disclaimer: I have never played competitive magic and have never won a magic tournament (I played in a draft once at the Local Game Store)

$0.49 No-Regrets Egret (Not Tournament Legal) Mystery Booster 2 $0.49 Value Town (Not Tournament Legal) Mystery Booster 2 $0.69 Gobland (Not Tournament Legal) Mystery Booster 2 $0.49 Maestros' Totally Safe Hideout (Not Tournament Legal) Mystery Booster 2 $0.49 Processing Plant (Not Tournament Legal) Mystery Booster 2 $0.49 Temur Elevator (Not Tournament Legal) Mystery Booster 2 $0.49 Wisedrafter's Will (Not Tournament Legal) Mystery Booster 2 $0.49 Planeswalkerificate (Not Tournament Legal) Mystery Booster 2 $0.59 Kozilek, Compleated (Not Tournament Legal) Mystery Booster 2 $0.49 Omenpath to Naya (Not Tournament Legal) Mystery Booster 2 $0.49 Heart of a Duelist (Not Tournament Legal) Mystery Booster 2 $0.49 Under-Construction Skyscraper (Not Tournament Legal) Mystery Booster 2 0 results found
Reading MaRos comments over the weekend, I still agree with him that the playtest cards are problematic
Lurrus doesn't let you play lands from your graveyard
The only other issue with Modern Horizons 2 is that it sets the bar incredibly high