mtg ikoria commander precons Magic: The Gathering Symbiotic Swarm Deck | 100 Card Deck Reviewing 2020's Preconstructed Commander Decks

(To surveil 1, look at the top card of your library

The first is a triggered ability: "When this permanent enters, target player may search their library for a card named [name], reveal it, put it into their hand, then shuffle." Note that the target player searches their library (which may be affected by effects such as that of Stranglehold) and that the card they find is revealed, even though these words aren't included in the ability's reminder text

#2 Gotta be And These are, similarly to the OP's, two lands from the same set

However, it would be particularly powerful in decks that perform library manipulation or care about casting spells from anywhere other than your hand

At its heart, Affinity is an aggro deck, but since it relies on synergy between its cards to function, it certainly has a combo component to it

Echo Echo is a way to obtain a more efficient card by paying the cost in two steps