Xantcha attacks each combat if able and can't attack its owner or planeswalkers its owner controls
Though this can technically damage you in a 1 on 1 game, Basilisk Collar can give it lifelink, meaning you replenish any damage you do to yourself
Rivers Rebuke is more of a catch-all and more in speed with what you want Cyclonic Rift to do, but it's at sorcery speed, so you lose a lot of utility with it
You can drop another land each turn and then tap it with six mana to dig six and drop, for free, a dork with a mana value equal to or less than your land count
If you can't cast the card, perhaps because there are no legal targets available, it remains exiled with no time counters on it, and it's no longer suspended
its a portal to a universe where every shuffle of cards whispers tales of bravery and despair