Rift Elemental has an activated ability for that removes a time counter from a permanent or suspended card you own
His evasive keyword gives him moderate protection from opposing characters targeting him, and his What Comes Next ability makes him a constant irritation to opposing players as the moment he hits the field Genie lets his illumineer draw a card immedietely
World Breaker 5 The big Acidic Slime
Want to destroy enchantments (Aven Cloudchaser), draw cards (Benalish Heralds), exile creatures (Catapult Master), prevent damage (Combat Medic), gain life (Conclave Phalanx), prevent all combat damage (Dream Fighter, Frontline Strategist), deal damage (Goblin Legionnaire, Rockcaster Platoon), bounce a creature (Sun Ce, Young Conqueror), or destroy a land (Keldon Arsonist)
Just remember that it only works for permanents you control (it doesn't work for your opponents' stuff), and that it only works with time counters (other types of counters are unaffected)
I remember going online to see what users overseas thought of it and reading a comment to the effect of, Why is Ledyba crying