4 is about right to not be a broken source of giant creatures, some of which have really strong abilities
Its that last part that balances it out even if folks dont have removal, they can run at you, depleting the resource youd use to Channel
A summon is a saga creature, so it works exactly like a saga: Once you reach the final chapter, and its triggered ability resolves, you have to sacrifice the saga
Each deck set includes 1 ready-to-play deck of 100 Magic cards (2 Traditional Foil Legendary cards, 98 nonfoil cards), a 2-card Collector Booster Sample Pack (contains 2 alt-border cards, with 1 Traditional Foil or nonfoil card of rarity Rare or higher and 1 Traditional Foil Uncommon card), 1 foil-etched Display Commander (a thick cardstock copy of the commander card with foil etched into the cards border and art), 10 double-sided tokens, 1 deck box (can hold 100 sleeved cards), 1 Life Wheel, 1 strategy insert, and 1 reference card.
If you've been a longtime Magic the Gathering player, or else just a longtime fan like me, then you may recall the Portal and Portal Second Age sets from the late 90s
