Each creature that's attacking one of your opponents has trample.
, : You may put a creature or Vehicle card from your hand onto the battlefield. If you put an artifact onto the battlefield this way, put two +1/+1 counters on it.
Oviya cheats fat creatures and Vehicles into play from hand each turn while granting your whole team trample, so you flood the board with big bodies and crash through blockers. You ramp early, deploy a threat per turn with her activated ability, and overwhelm opponents with trampling beaters and Vehicles boosted by +1/+1 counters. Win by going wide and tall, then attacking with everything having trample.
Repeatable free cheat-into-play effect dodges spot interaction and saves mana every turn
Mono-green gives access to the best ramp, allowing huge mana piles to cast and untap
Team-wide trample makes chump blocking nearly worthless and pressures everyone
Synergizes with both creatures and Vehicles, plus rewards artifacts with extra counters
Her ability is sorcery-speed and only puts cards from hand, so empty hands shut it down
Mono-green lacks card draw consistency and has no way to interact with the stack
Board wipes hit hard since the strategy is creature-density dependent
She's tap-dependent and slow if removed, and green struggles to protect her