Prismata is a true strategy game where very little of the outcome is determined by randomness. It’s similar to Chess as Prismata has almost zero RNG, unlike low-RNG card games like Gwent or high-RNG card games like Magic the Gathering and Eternal. Unlike Chess, Prismata is more visceral as you build up an economy like Starcraft and have units attacking each other. Prismata also leads to varied gameplay as each set of units is different from game to game.
The free-to-play experience is excellent and you have access to almost all of the game as a free-to-play player. Not surprisingly, Prismata is my current addiction. Definitely check it out.