Lets face it, banding and taxing artifact activations (by requiring them to pay a white mana assuming they had access to white) wasnt all that earth-shattering
Other notable Ruby cards are Honest John Not That Honest, who has an ability that costs opponents 1 Lore whenever his player brings a Floodborn character in play, and Queen of Hearts Sensing Weakness, which has a powerful draw effect and is a Floodborn character, meaning that players can bring it out relatively quick into the game
Two mana one-for-one removal can barely keep up
And when you draw your third card in a turn, Emerald Collector conjures a Mox Emerald to your hand, which feels insane to me, a non-Alchemy player
Azlask, the Swelling Scourge $19.50 Annihilator is a mechanic that, while generally balanced in the past, many players flat-out hate
Whenever you draw your second card each turn, put a +1/+1 counter on Kid Loki