At best youre going to Strip Mine your opponents out of the game without repercussions
Rhys, the Evermore Rhys, the Evermore would be just fine if it gave a creature indestructible with its flash effect
During your earlier turns, youll want to use its mana ability so you can play your more expensive cards a couple of turns early
If youre not familiar with them, they have a fairly large trading card games auction coming up in March 2022 that might give you a good idea of how things work at Heritage
Its great in Elves, for example, so you might want to run a Pyroclasm or two out of the board
Blue has it unconditionally, black lets you trade life for it, green often bases it on your creatures, and red has you discard cards in exchange for a draw, but white has almost nothing