What if there was a cycle of
lands that had their own special abilities to the colour, like the castles but better and affecting only your creatures? For example:
[name]
Land -
Forest(T: Add {G})
{1C}{G}{G}: Creatures you control gain trample until end of turn.
Maybe Black could give your creatures deathtouch until end of turn, while Red gives your creatures menace. Blue could make your creatures hexproof, and white would give creatures you control flying. They'd be sort of similar to the castles, except with better abilities and fetchable. Maybe too powerful, though. I, for one, would love to see a cycle like this where the abilities of the
lands can make a big impact to the game, instead of just letting you scry 2 or make a 1/1 token. This ability could be even better used with the keyword counters used in Ikoria! Something like "Put a hexproof counter on target creature you control" would be nice to have.