Worthy Knight is a pretty potent threat for just two mana
However, as is the case with many Magic cards, power creep over time has led to strategies that can achieve the effect of this card for less mana
[105] Journalist Kenji Hatakeyama noted that the ownership structure of Pokemon is uncommon
Among the creatures revealed to be in the set are common enemies such as flumphs, major antagonists from D&D history - including five-headed dragon Tiamat and spider queen Lolth - and references to staple Dungeons & Dragons NPCs, such as the Preposterous Innkeeper
If you can realistically expect to trigger your draw-2 effects at least once per turn cycle, you'll be floating a ton of extra lands into play, and your hand's already likely to be stocked given the archetype, so you shouldn't be running out of land drops any time soon
On a more abstract note, we could see cards that punish players for playing more than one spell