One of my favorites is using Heliod, Sun-Crowned to put +1/+1 counters on him in order to make it harder for opponents to pay
Every time it attacks, you can copy and cast a legendary card or another rat from your graveyard, which can lead to some explosive plays and recur your dead allies
Space Marine Devastator Our penultimate(ish) charting card is this
It is mandatory
7 Hour Of Promise Promises Of Lands And Zombies You really want your ramp spells to come down in the early stages of the game, or provide extra utility if they're more expensive
Final Fantasy : 'Gambler' types (Setzer, Selphie, Cait Sith, Lady Luck) have a variant on this that allow them to use a slot machine or dice to pull out a nearly random effect, but odds are not entirely random, due to a slightly skill or luck based timing on the slots