By giving decks playing Urza's Saga access to their colored duals and mana, this card fundamentally course corrected Vintage into a different era of gameplay
When a creature cards activated ability tells you to choose a card from an opponents graveyard and put it onto your battlefield, for instance, that action cannot be countered, as the action itself is not a spell in MTG
Before "Dragon Lady" attacks, Vivian activates "Flying Dragon Whirl" to target her "Dragon Lady" and send four Dragon-Type monsters ("Pitch-Dark Dragon", "Blackland Fire Dragon", "Kiryu" and "Sky Dragon") from her Deck to the Graveyard in order to increase the ATK of "Dragon Lady" by 300 for each Dragon-type monster sent this way ("Dragon Lady": 1400 2600/2100)
Note the words "if able" in the ability
If their mana is already being held down by Stasis, and then you drop a Tabernacle in to play, it is unlikely theyll be able to pay for their creatures for long, turning Tabernacle in to a free Wrath of God, which sticks around on the battlefield
