Hamza allows you to go big and wide, and its hard to counter
The static ability of draining life can add up if you keep thieving creatures, but in most cases stealing that much stuff will cause you to win the game anyway its a bit of an odd design all-around, seemingly balanced for a more casual table but also sporting the option to permanently capture enemy Commanders
Seaside Citadel ($2) Yes, all four of them are on the list of things you should stock up on
It also reads, Whenever one or more Artifact Creatures you control attack, Alibou, Ancient Witness deals X damage to any target and you scry X, where X is the number of tapped artifacts you control. The best part about this is that it includes any mana rocks or whatever else you have out
Or if you want to stay on Eldraine, Kenrith, the Returned King is fair game
However, when played correctly, this planeswalker can control the game and lead you to victory with her ability to manipulate permanents and leverage unique synergies