Not only do we use our experiences to know what mechanics and designs work best, but we can reuse discarded ideas in different contexts where they function better
Toluz, Clever Conductor I like Toluz, Clever Conductor best alongside symmetrical discard effects like Liliana of the Veil and Cunning Lethemancer to break the symmetry
Its a big list, no doubt, and Im sure Ive not included half as many cards as I should have
Deck boxes like the Ultimate Guard Boulders completely open up, which leaves you with two compartments to store your tokens, dice, counters, and other various things you might want to have close by during a match
Ravnica: City of Guilds Doubling Season Hunted Dragon Selesnya Guildmage Twilight Drover Hunted creatures create creature tokens and give them to target opponent to offset the caster getting a better rate creature