If an effect allows you to spend mana "as though it were mana" of any color or type, that allows you to spend mana you couldn't otherwise spend, but it doesn't change what mana you spent to cast the spell
The biggest hurdle is that its extremely slow and durdly, but proliferate effects and extra turn spells help you to catch up
Justice Strike can only outright kill creatures with a power equal to or greater than its toughness, of where there are plenty in Guilds of Ravnica
If its not on the battlefield when the second card is drawn, the ability cant trigger at all that turn
The unique selling point is built-in recovery without slowing your curve , making Rivaz ideal for budget-conscious players who want consistent Dragon threats across longer games
In terms of price per pack, this means youll only be paying $4.49 per booster