As there are only three modes, even if X is greater than three, you won't get additional effects after choosing each mode once
You either create cards that just objectively suck (i.e.: most of this list), or you risk making an actual good leyline that breaks the game by nature of how these cards work
Uril, the Miststalker (Commander) - Equipment Uril, the Miststalker Rank #473 22decks Sep 25, 2025 What if Commander Had Sideboards
And, of course, a lot of Disney
You can psych your opponents out with Evercoat Ursine too, exiling cards that aren't very good to bait out a removal spell
For example, you couldn't find a card with mana cost or one with mana cost