On average this card is really under-costed too as three mana for a 3/2 haste is about right, the extra one you pay extra for your dork is compared to the cost of the spell you cascade into
These cards are strong because of their ability to essentially act as second land drops on early turns
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That said, if your deck does run Equipment, +1/+1 counter effects, or anthems, Esper Sentinels tax can get truly untenable, virtually guaranteeing you three or more cards per turn cycle
Instant Color tag templates(None) Lapse of Certainty Counter target spell
7 Twinflame Tyrant Can Kill Opponents Out of Nowhere Double the Damage, Double the Fun Damage-doubling permanents are usually enchantments, dependent on other cards to truly make an impact