His ability to reduce the cost of colorless spells is a boon when you're eyeing that high-cost Eldrazi in your hand
Rather than combo decks having to rely on something like Laboratory Maniac, which was easier for the opponent to disrupt, Oracle winning the game when it enters the battlefield means that even if the Oracle dies in response, its too late
Brawl Not Legal Vintage Legal Timeless Legal Commander Legal Pauper Not Legal Oathbreaker Legal Penny Not Legal Toolbox Buy This Card Notes and Rules Information for Vivi Ornitier: Vivi Ornitier's first ability is a mana ability
He comes in indestructible and his ability automatically triggers at end step, so this feels sort of like an Etali where you pay one mana more to guarantee at least one trigger while also draining your opponents for a bunch of life
I like it being given a +1/+1 counter from the Biophagus above since that's 3 more damage you'll deal and more likely to get combat damage past blockers with the trample it has
There are a number of ways to profit from lands going to the graveyard, not to mention wanting to recur lands like Mortuary Mire with anything that lets you play lands out of your graveyard
